implicit declaration of function df_reli

[mjames-upc]

dgdriv.c: In function 'dg_driv':
dgdriv.c:346:7: warning: implicit declaration of function 'df_prcl'; did you mean 'df_plcl'? [-Wimplicit-function-declaration]
       df_prcl  ( func, iret );
       ^~~~~~~
       df_plcl
dgdriv.c:350:7: warning: implicit declaration of function 'df_reli'; did you mean 'df_relh'? [-Wimplicit-function-declaration]
       df_reli ( iret );
       ^~~~~~~
       df_relh