Fixed C++26 invalid enum operation (#7954)

imgui_widgets.cpp

@@ -5196,7 +5196,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
     {
         // For focus requests to work on our multiline we need to ensure our child ItemAdd() call specifies the ImGuiItemFlags_Inputable (see #4761, #7870)...
         Dummy(ImVec2(text_size.x, text_size.y + style.FramePadding.y));
-        g.NextItemData.ItemFlags |= ImGuiItemFlags_Inputable | ImGuiItemFlags_NoTabStop;
+        g.NextItemData.ItemFlags |= (ImGuiItemFlags)ImGuiItemFlags_Inputable | ImGuiItemFlags_NoTabStop;
         EndChild();
         item_data_backup.StatusFlags |= (g.LastItemData.StatusFlags & ImGuiItemStatusFlags_HoveredWindow);