Build: Tests fix

Author: mgol

ui/widgets/resizable.js

@@ -94,9 +94,15 @@ $.widget( "ui.resizable", $.ui.mouse, {
 		// TODO: determine which cases actually cause this to happen
 		// if the element doesn't have the scroll set, see if it's possible to
 		// set the scroll
-		el[ scroll ] = 1;
-		has = ( el[ scroll ] > 0 );
-		el[ scroll ] = 0;
+		try {
+			el[ scroll ] = 1;
+			has = ( el[ scroll ] > 0 );
+			el[ scroll ] = 0;
+		} catch ( e ) {
+
+			// `el` might be a string, then setting `scroll` will throw
+			// an error in strict mode; ignore it.
+		}
 		return has;
 	},