QmlJs: fixed a regression in reformatter.

The commit b26920c3 introduced a bug
in reformatting properties lacking an object initializer.

Change-Id: I30f9c9c8a005660e7af4a6c97d0b1ff1be461548
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/libs/qmljs/qmljsreformatter.cpp

@@ -554,6 +554,8 @@ protected:
                 accept(ast->statement);
             } else if (ast->binding) {
                 accept(ast->binding);
+            } else {
+                out(ast->identifierToken);
             }
         } else { // signal
             out("signal ");