Fixed uninitialized fields in constructor - wouldn't have caused a problem (thanks Coverity!)

imgui.cpp

@@ -1150,6 +1150,10 @@ struct ImGuiDrawContext
         MenuBarOffsetX = 0.0f;
         StateStorage = NULL;
         LayoutType = ImGuiLayoutType_Vertical;
+        ItemWidth = 0.0f;
+        ButtonRepeat = false;
+        AllowKeyboardFocus = true;
+        TextWrapPos = 1.0f;
         ColorEditMode = ImGuiColorEditMode_RGB;
         memset(StackSizesBackup, 0, sizeof(StackSizesBackup));
 
@@ -1333,6 +1337,7 @@ struct ImGuiState
         ActiveIdIsAlive = false;
         ActiveIdIsJustActivated = false;
         ActiveIdIsFocusedOnly = false;
+        ActiveIdWindow = NULL;
         MovedWindow = NULL;
         SettingsDirtyTimer = 0.0f;
         DisableHideTextAfterDoubleHash = 0;
@@ -3201,7 +3206,6 @@ bool ImGui::BeginPopupContextVoid(const char* str_id, int button)
 bool ImGui::BeginChild(const char* str_id, const ImVec2& size_arg, bool border, ImGuiWindowFlags extra_flags)
 {
     ImGuiWindow* window = GetCurrentWindow();
-
     ImGuiWindowFlags flags = ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoMove|ImGuiWindowFlags_NoResize|ImGuiWindowFlags_NoSavedSettings|ImGuiWindowFlags_ChildWindow;
 
     const ImVec2 content_max = window->Pos + ImGui::GetContentRegionMax();
@@ -3441,6 +3445,7 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
     g.CurrentWindowStack.push_back(window);
     SetCurrentWindow(window);
     CheckStacksSize(window, true);
+    IM_ASSERT(parent_window != NULL || !(flags & ImGuiWindowFlags_ChildWindow));
 
     const int current_frame = ImGui::GetFrameCount();
     bool window_was_visible = (window->LastFrameDrawn == current_frame - 1);   // Not using !WasActive because the implicit "Debug" window would always toggle off->on
@@ -10243,7 +10248,6 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
         filter.Draw("Filter colors", 200);
 
         ImGui::BeginChild("#colors", ImVec2(0, 300), true);
-
         ImGui::ColorEditMode(edit_mode);
         for (int i = 0; i < ImGuiCol_COUNT; i++)
         {