Fix image resolution options setting in wxBMPHandler code.

This was broken by the changes of r76144 as the resolution information read
from the bitmap was never used due to a typo in Resolution::Init().

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76538 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagbmp.cpp

@@ -1113,7 +1113,7 @@ bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream,
         {
             m_x = x;
             m_y = y;
-            m_valid = false;
+            m_valid = true;
         }
 
         bool IsValid() const { return m_valid; }