add wxDL_QUIET flag; use RawGetSymbol() instead of GetSymbol() in wxDL_INIT_FUNC to avoid error messages for missing functions (this is also consistent with wxDL_INIT_FUNC_AW)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51032 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/dynlib.cpp

@@ -101,7 +101,7 @@ bool wxDynamicLibrary::Load(const wxString& libnameOrig, int flags)
     m_handle = RawLoad(libname, flags);
 #endif
 
-    if ( m_handle == 0 )
+    if ( m_handle == 0 && !(flags & wxDL_QUIET) )
     {
 #ifdef wxHAVE_DYNLIB_ERROR
         Error();