sw: convert assert(bSelected out of sync) to SAL_WARN for now

This evidently happens sometimes, but when it does it it's
impossible to reproduce... Let's use SAL_WARN for now.

Change-Id: Id724fd52060bfae45f9eeb16163ddfc94e53af03
Reviewed-on: https://gerrit.libreoffice.org/64447
Tested-by: Jenkins
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>

sw/source/core/access/acccell.cxx

@@ -91,7 +91,7 @@ void SwAccessibleCell::GetStates( ::utl::AccessibleStateSetHelper& rStateSet )
     if( IsSelected() )
     {
         rStateSet.AddState( AccessibleStateType::SELECTED );
-        assert(m_bIsSelected && "bSelected out of sync");
+        SAL_WARN_IF(!m_bIsSelected, "sw.a11y", "bSelected out of sync");
         ::rtl::Reference < SwAccessibleContext > xThis( this );
         GetMap()->SetCursorContext( xThis );
     }

sw/source/core/access/accframebase.cxx

@@ -82,7 +82,7 @@ void SwAccessibleFrameBase::GetStates(
     if( IsSelected() )
     {
         rStateSet.AddState( AccessibleStateType::SELECTED );
-        assert(m_bIsSelected && "bSelected out of sync");
+        SAL_WARN_IF(!m_bIsSelected, "sw.a11y", "bSelected out of sync");
         ::rtl::Reference < SwAccessibleContext > xThis( this );
         GetMap()->SetCursorContext( xThis );