Don't show 'invalid property name' errors if we can't resolve the type.

The idea is that it may be a plugin-provided type. We don't want user
code to be riddled with error markers in that case.

Reviewed-by: Roberto Raggi

src/libs/qmljs/qmljscheck.h

@@ -53,7 +53,8 @@ protected:
     virtual bool visit(AST::UiArrayBinding *ast);
 
 private:
-    void visitQmlObject(AST::Node *ast, AST::UiObjectInitializer *initializer);
+    void visitQmlObject(AST::Node *ast, AST::UiQualifiedId *typeId,
+                        AST::UiObjectInitializer *initializer);
     void checkScopeObjectMember(const AST::UiQualifiedId *id);
 
     void warning(const AST::SourceLocation &loc, const QString &message);