restore the stream position in wxImageHandler itself instead of forcing all

derived classes to do it themselves


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15642 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagpcx.cpp

@@ -490,8 +490,6 @@ bool wxPCXHandler::DoCanRead( wxInputStream& stream )
     if ( !stream )
         return FALSE;
 
-    stream.SeekI(-1, wxFromCurrent);
-
     // not very safe, but this is all we can get from PCX header :-(
     return c == 10;
 }