USHRT_MAX -> SAL_MAX_UINT16

...presumably forgotten when changing SwEditShell::InsertDDETable parameters
from USHORT to sal_uInt16 in 7f33ed41
"removetooltypes01: #i112600# Remove tools types from sw"

Change-Id: I28ad46bdfb6c95a7d2e0bcbf2ef8eef29217baa5
Reviewed-on: https://gerrit.libreoffice.org/48436Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

sw/source/uibase/dochdl/swdtflvr.cxx

@@ -2148,7 +2148,7 @@ bool SwTransferable::PasteDDE( TransferableDataHelper& rData,
                 sal_Int32 nCols = comphelper::string::getTokenCount(sTmp, '\t');
 
                 // don't try to insert tables that are too large for writer
-                if (nRows > USHRT_MAX || nCols > USHRT_MAX)
+                if (nRows > SAL_MAX_UINT16 || nCols > SAL_MAX_UINT16)
                 {
                     if( bMsg )
                         ScopedVclPtrInstance<MessageDialog>(nullptr, SwResId(STR_TABLE_TOO_LARGE), VclMessageType::Info)->Execute();