Togl/src/ml_togl.c: funcs wrong names

[ildar]

looks like plain wrong names... somehow

ml_togl.c: In function 'TOGLenum_val':                                
ml_togl.c:34:5: warning: implicit declaration of function 'invalid_argument'; did you mean 'caml_invalid_argument'? [-Wimplicit-function-declaration
]                                                                                                                                                   
   34 |     invalid_argument ("Unknown Togl tag");                                                                                                  
      |     ^~~~~~~~~~~~~~~~                                                                                                                        
      |     caml_invalid_argument                                         
ml_togl.c: In function 'togl_prerr':                                      
ml_togl.c:40:20: warning: implicit declaration of function 'copy_string'; did you mean 'caml_copy_string'? [-Wimplicit-function-declaration]        
   40 |     value ml_msg = copy_string(msg);                                                                                                        
      |                    ^~~~~~~~~~~                                                                                                              
      |                    caml_copy_string                                                                                                         
ml_togl.c:41:20: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
   41 |     value *prerr = caml_named_value("togl_prerr");
      |                    ^~~~~~~~~~~~~~~~                               
ml_togl.c: In function 'ml_Togl_Init':                                                                                                              
ml_togl.c:48:21: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]                               
   48 |     value *interp = caml_named_value("cltclinterp");                                                                                        
      |                     ^~~~~~~~~~~~~~~~                              
ml_togl.c:52:7: warning: implicit declaration of function 'raise_with_string'; did you mean 'caml_raise_with_string'? [-Wimplicit-function-declarati
on]                          
   52 |       raise_with_string(*caml_named_value("tkerror"), "Togl_Init failed");                                                                  
      |       ^~~~~~~~~~~~~~~~~                                                                                                                     
      |       caml_raise_with_string                                                                                                                
ml_togl.c: In function 'callback_CreateFunc':                                                                                                       
ml_togl.c:80:3: warning: implicit declaration of function 'callback'; did you mean 'calloc'? [-Wimplicit-function-declaration]                      
   80 | { callback (Field(*callbacks, func), Val_addr(togl)); }           
ml_togl.c:80:3: warning: implicit declaration of function 'callback'; did you mean 'calloc'? [-Wimplicit-function-declaration]                      
   80 | { callback (Field(*callbacks, func), Val_addr(togl)); }                                                                                     
      |   ^~~~~~~~                                                                                                                                  
ml_togl.c:91:1: note: in expansion of macro 'CALLBACK'                                                                                              
   91 | CALLBACK (CreateFunc)                                                                                                                       
      | ^~~~~~~~                                                                                                                                    
ml_togl.c: In function 'ml_Togl_CreateFunc':                                                                                                        
ml_togl.c:87:36: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]                                   
   87 | { if (callbacks == NULL) callbacks = caml_named_value ("togl_callbacks"); \                                                                 
      |                                    ^

[ildar]

https://github.com/garrigue/lablgl/pull/8