Fixed flag ImGuiWindowFlags_AlwaysAutoResize been passed as alpha argument (#1251)

examples/common/example-glue.cpp

@@ -19,9 +19,9 @@ void showExampleDialog(entry::AppI* _app, const char* _errorText)
 		  ImVec2(10.0f, 50.0f)
 		, ImGuiSetCond_FirstUseEver
 		);
+	ImGui::SetNextWindowSize(ImVec2(256.0f, 200.0f));
 	ImGui::Begin(temp
 		, NULL
-		, ImVec2(256.0f, 200.0f)
 		, ImGuiWindowFlags_AlwaysAutoResize
 		);