Fix mistake usage of macro PRIdPTR

squirrel/lua-regex.c

@@ -521,7 +521,7 @@ static int add_value (LuaMatchState *ms, char_buffer_st **b, const char *s,
             }
             if (cl == CAP_POSITION){
                 char buf[32];
-                snprintf(buf, sizeof(buf), PRIdPTR, ms->capture[il].init - ms->src_init + 1);
+                snprintf(buf, sizeof(buf), "%" PRIdPTR, ms->capture[il].init - ms->src_init + 1);
                 if(!char_buffer_add_str(ms, b, buf, strlen(buf))) return 0;
             }
             else