Updates to fix Watcom C/C++ 11.0 compiler warning problems. Now compiles
clean with this compiler. Hopefully I did this without breaking other compilers. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9967 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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