message: Plot: plot a flat line if scale_min==scale_max
diff: @@ -9287,11 +9287,12 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
  }
  const float t_step = 1.0f / (float)res_w;
  + const float inv_scale = (scale_min == scale_max) ? 0.0f : (1.0f / (scale_max - scale_min));
  float v0 = values_getter(data, (0 + values_offset) % values_count);
  float t0 = 0.0f;
  - ImVec2 tp0 = ImVec2( t0, 1.0f - ImSaturate((v0 - scale_min) / (scale_max - scale_min)) ); // Point in the normalized space of our target rectangle
  - float histogram_zero_line_t = (scale_min * scale_max < 0.0f) ? (-scale_min / (scale_max - scale_min)) : (scale_min < 0.0f ? 0.0f : 1.0f); // Where does the zero line stands
  + ImVec2 tp0 = ImVec2( t0, 1.0f - ImSaturate((v0 - scale_min) * inv_scale) ); // Point in the normalized space of our target rectangle
  + float histogram_zero_line_t = (scale_min * scale_max < 0.0f) ? (-scale_min * inv_scale) : (scale_min < 0.0f ? 0.0f : 1.0f); // Where does the zero line stands
  const ImU32 col_base = GetColorU32((plot_type == ImGuiPlotType_Lines) ? ImGuiCol_PlotLines : ImGuiCol_PlotHistogram);
  const ImU32 col_hovered = GetColorU32((plot_type == ImGuiPlotType_Lines) ? ImGuiCol_PlotLinesHovered : ImGuiCol_PlotHistogramHovered);
  @@ -9302,7 +9303,7 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
  const int v1_idx = (int)(t0 * item_count + 0.5f);
  IM_ASSERT(v1_idx >= 0 && v1_idx < values_count);
  const float v1 = values_getter(data, (v1_idx + values_offset + 1) % values_count);
  - const ImVec2 tp1 = ImVec2( t1, 1.0f - ImSaturate((v1 - scale_min) / (scale_max - scale_min)) );
  + const ImVec2 tp1 = ImVec2( t1, 1.0f - ImSaturate((v1 - scale_min) * inv_scale) );
  // NB: Draw calls are merged together by the DrawList system. Still, we should render our batch are lower level to save a bit of CPU.
  ImVec2 pos0 = ImLerp(inner_bb.Min, inner_bb.Max, tp0);
  