fix error support clang

[sgzGary]

I meet problems like this when I use clang: [ 75s] src/dmidecodemodule.c:916:28: error: incompatible function pointer types initializing 'PyCFunction' (aka 'struct _object ()(struct _object *, struct _object *)') with an expression of type 'PyObject *(PyObject *, PyObject *, PyObject *)' (aka 'struct _object *(struct _object *, struct _object *, struct _object *)') [-Wincompatible-function-pointer-types] [ 75s] 916 | {(char *)"xmlapi", dmidecode_xmlapi, METH_VARARGS | METH_KEYWORDS, [ 75s] | ^~~~~~~~~~~~~~~~ [ 75s] src/dmidecodemodule.c:997:9: warning: 'xmlXPathInit' is deprecated [-Wdeprecated-declarations] [ 75s] 997 | xmlXPathInit(); [ 75s] | ^ [ 75s] /usr/include/libxml2/libxml/xpath.h:562:1: note: 'xmlXPathInit' has been explicitly marked deprecated here [ 75s] 562 | XML_DEPRECATED [ 75s] | ^ [ 75s] /usr/include/libxml2/libxml/xmlversion.h:447:43: note: expanded from macro 'XML_DEPRECATED' [ 75s] 447 | # define XML_DEPRECATED attribute((deprecated)) [ 75s] | ^ [ 75s] src/dmidecodemodule.c:1027:72: error: incompatible function pointer types passing 'void (void )' to parameter of type 'PyCapsule_Destructor' (aka 'void ()(struct _object *)') [-Wincompatible-function-pointer-types] [ 75s] 1027 | PyModule_AddObject(module, "options", PyCapsule_New(opt, NULL, destruct_options)); [ 75s] | ^~~~~~~~~~~~~~~~ [ 75s] /usr/include/python3.11/pycapsule.h:31:26: note: passing argument to parameter 'destructor' here [ 75s] 31 | PyCapsule_Destructor destructor); [ 75s] | ^ [ 75s] 5 warnings and 2 errors generated. so i did some change