Fix wxEnumProperty::GetIndexForValue

GetIndexForValue should indicate that given property value does not exist by returning special index value(-1).

Closes #14450.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76876 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/props.cpp

@@ -1171,11 +1171,11 @@ int wxEnumProperty::GetIndexForValue( int value ) const
     if ( !m_choices.IsOk() )
         return -1;
 
-    int intVal = m_choices.Index(value);
+    const int intVal = m_choices.Index(value);
     if ( intVal >= 0 )
         return intVal;
 
-    return value;
+    return -1;
 }
 
 wxEnumProperty::~wxEnumProperty ()