Change function get_num_threads to get_cuda_num_threads

Signed-off-by: Rafael Ravedutti <rafaelravedutti@gmail.com>

common/includes/util.h

@@ -39,8 +39,8 @@ extern double myrandom(int*);
 extern void random_reset(int *seed, int ibase, double *coord);
 extern int str2ff(const char *string);
 extern const char* ff2str(int ff);
-extern int get_num_threads();
 extern void readline(char *line, FILE *fp);
 extern void debug_printf(const char *format, ...);
+extern int get_cuda_num_threads();
 
 #endif