Improved clarity in comment. (#7642)

imgui_internal.h

diff --git a/imgui_internal.h b/imgui_internal.h
index 8733698..0d5cd43 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -2998,7 +2998,7 @@
 {
     // Windows
     // We should always have a CurrentWindow in the stack (there is an implicit "Debug" window)
-    // If this ever crash because g.CurrentWindow is NULL it means that either
+    // If this ever crashes because g.CurrentWindow is NULL, it means that either:
     // - ImGui::NewFrame() has never been called, which is illegal.
     // - You are calling ImGui functions after ImGui::EndFrame()/ImGui::Render() and before the next ImGui::NewFrame(), which is also illegal.
     inline    ImGuiWindow*  GetCurrentWindowRead()      { ImGuiContext& g = *GImGui; return g.CurrentWindow; }