SliderInt: Fixed click/drag when v_min==v_max from setting the value to zero. (#3774)

docs/CHANGELOG.txt

@@ -48,6 +48,8 @@ Other Changes:
 - Tables: Fixed PopItemWidth() or multi-components items not restoring per-colum ItemWidth correctly. (#3760)
 - Window: Fixed minor title bar text clipping issue when FramePadding is small/zero and there are no
   close button in the window. (#3731)
+- SliderInt: Fixed click/drag when v_min==v_max from setting the value to zero. (#3774) [@erwincoumans]
+  Would also repro with DragFloat() when using ImGuiSliderFlags_Logarithmic with v_min==v_max.
 - imgui_freetype: Facilitated using FreeType integration: [@Xipiryon, @ocornut]
   - Use '#define IMGUI_ENABLE_FREETYPE' in imconfig.h should make it work with no other modifications
     other than compiling misc/freetype/imgui_freetype.cpp and linking with FreeType.

imgui_widgets.cpp

@@ -2589,7 +2589,7 @@ template<typename TYPE, typename SIGNEDTYPE, typename FLOATTYPE>
 TYPE ImGui::ScaleValueFromRatioT(ImGuiDataType data_type, float t, TYPE v_min, TYPE v_max, bool is_logarithmic, float logarithmic_zero_epsilon, float zero_deadzone_halfsize)
 {
     if (v_min == v_max)
-        return (TYPE)0.0f;
+        return v_min;
     const bool is_decimal = (data_type == ImGuiDataType_Float) || (data_type == ImGuiDataType_Double);
 
     TYPE result;