PlotLines, PlotHistogram: Ignore NaN values when calculating min/max bounds. (#2485)

imgui_widgets.cpp

@@ -5577,6 +5577,8 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
         for (int i = 0; i < values_count; i++)
         {
             const float v = values_getter(data, i);
+            if (v != v) // Ignore NaN values
+                continue;
             v_min = ImMin(v_min, v);
             v_max = ImMax(v_max, v);
         }