MFH: remove unnecessary warning in case of exception

Author: tony2001

ext/pcre/php_pcre.c

@@ -811,7 +811,9 @@ static int preg_do_repl_func(zval *function, char *subject, int *offsets, int co
 		result_len = Z_STRLEN_P(retval_ptr);
 		zval_ptr_dtor(&retval_ptr);
 	} else {
-		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call custom replacement function");
+		if (!EG(exception)) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call custom replacement function");
+		}
 		result_len = offsets[1] - offsets[0];
 		*result = estrndup(&subject[offsets[0]], result_len);
 	}

ext/pcre/tests/preg_replace_callback2.phpt

@@ -22,7 +22,6 @@ var_dump(preg_replace_callback('~\A.~', 'g', array(array('xyz'))));
 var_dump(preg_replace_callback('~\A.~', create_function('$m', 'return strtolower($m[0]);'), 'ABC'));
 ?>
 --EXPECTF--
-Warning: preg_replace_callback(): Unable to call custom replacement function in %spreg_replace_callback2.php on line %d
 array(3) {
   [0]=>
   string(12) "'a' 'b3' bcd"