Fixes #748 - Vtiger 7.1: Webservice describe operation does not return correct labels

include/Webservices/DescribeObject.php

@@ -10,7 +10,15 @@
 	
 	function vtws_describe($elementType,$user){
 		
-		global $log,$adb;
+		global $log,$adb,$app_strings;
+
+		//setting $app_strings 
+		if (!$app_strings) {
+			$currentLanguage = Vtiger_Language_Handler::getLanguage();
+			$moduleLanguageStrings = Vtiger_Language_Handler::getModuleStringsFromFile($currentLanguage);
+			$app_strings = $moduleLanguageStrings['languageStrings'];
+		}
+
 		$webserviceObject = VtigerWebserviceObject::fromName($adb,$elementType);
 		$handlerPath = $webserviceObject->getHandlerPath();
 		$handlerClass = $webserviceObject->getHandlerClass();