Ajax: Fix for request aborted in ajaxSend

Fixes gh-1775
Close gh-1619

src/ajax.js

@@ -627,6 +627,12 @@ jQuery.extend({
 			if ( fireGlobals ) {
 				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
 			}
+
+			// If request was aborted inside ajaxSend, stop there
+			if ( state === 2 ) {
+				return jqXHR;
+			}
+
 			// Timeout
 			if ( s.async && s.timeout > 0 ) {
 				timeoutTimer = setTimeout(function() {