Update ImGuiFileDialog.cpp

fix when m_CurrentPathDecomposition is empty bug

Author: uusdnfdsfhnttyh

ImGuiFileDialog.cpp

@@ -2498,9 +2498,11 @@ void IGFD::FileManager::DrawPathComposer(const FileDialogInternal& vFileDialogIn
     if (IMGUI_BUTTON(editPathButtonString)) {
         inputPathActivated = !inputPathActivated;
         if (inputPathActivated) {
-            auto endIt = m_CurrentPathDecomposition.end();
-            m_CurrentPath = ComposeNewPath(--endIt);
-            IGFD::Utils::SetBuffer(inputPathBuffer, MAX_PATH_BUFFER_SIZE, m_CurrentPath);
+            if (!m_CurrentPathDecomposition.empty()) {
+                auto endIt = m_CurrentPathDecomposition.end();
+                m_CurrentPath = ComposeNewPath(--endIt);
+                IGFD::Utils::SetBuffer(inputPathBuffer, MAX_PATH_BUFFER_SIZE, m_CurrentPath);
+            }
         }
     }
     if (ImGui::IsItemHovered())