Fixed bug in reformatting QML code (duplicated property name).

Change-Id: I1af68aa979fbbc38edd0255c346b9df371c8fd26
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>

src/libs/qmljs/qmljsreformatter.cpp

@@ -548,12 +548,11 @@ protected:
                 out(ast->typeToken);
             }
             out(" ");
-            out(ast->identifierToken);
             if (ast->statement) {
+                out(ast->identifierToken);
                 out(": ", ast->colonToken);
                 accept(ast->statement);
             } else if (ast->binding) {
-                out(": ", ast->colonToken);
                 accept(ast->binding);
             }
         } else { // signal