Remove function_table var from the caller

function_table var is not used in call_user_function macro anymore
hence replace the usage with NULL

Author: c9s

Diff for: ibase_events.c

@@ -232,7 +232,7 @@ static isc_callback  _php_ibase_callback(ibase_event *event, /* {{{ */
 			}
 
 			/* call the callback provided by the user */
-			if (SUCCESS != call_user_function(EG(function_table), NULL,
+			if (SUCCESS != call_user_function(NULL, NULL,
 					&event->callback, &return_value, 2, args)) {
 				_php_ibase_module_error("Error calling callback %s", Z_STRVAL(event->callback));
 				break;

Diff for: php_ibase_udf.c

@@ -285,7 +285,7 @@ static void call_php(char *name, PARAMDSC *r, int argc, PARAMDSC **argv)
 		LOCK();
 
 		/* now call the function */
-		if (FAILURE == call_user_function(EG(function_table), NULL,
+		if (FAILURE == call_user_function(NULL, NULL,
 				&callback, &return_value, argc, args)) {
 			UNLOCK();
 			break;