Use restrict on pointers where it makes sense. (requires C99 support,

which we already assume)

src/val_str.c

@@ -47,7 +47,7 @@ const char *uc_val_2_str_bs(unsigned int val,
     return found;
 }
 
-const char *uc_str_2_str(const char *val, const struct UCStrStr *array)
+const char *uc_str_2_str(const char *restrict val, const struct UCStrStr *array)
 {
     const char *found = NULL;