Fix for compilation

Reverted variable, deleted by previous commit

src/slic3r/GUI/Gizmos/GLGizmoCut.cpp

@@ -502,7 +502,7 @@ bool GLGizmoCut3D::render_slider_double_input(const std::string& label, float& v
     constexpr float UndefMinVal = -0.1f;
     const float f_mm_to_in = static_cast<float>(ObjectManipulation::mm_to_in);
 
-    auto render_slider = [this, f_mm_to_in]
+    auto render_slider = [this, UndefMinVal, f_mm_to_in]
                          (const std::string& label, float& val, float def_val, float max_val, const wxString& tooltip) {
         float min_val = val < 0.f ? UndefMinVal : def_val;
         float value = val;