Fix alerts when building against wxMSW.
Fix alerts when building against wxMSW.

When building with VS2010 using wxWidgets-3.0.2 alerts were triggered if
 the menu bar is not attached *before* the menus are disabled.

felipebetancur/daala,kustom666/daala,xiph/daala,iankronquist/daala,HeadhunterXamd/daala,luctrudeau/daala,felipebetancur/daala,ycho/daala,nvoron23/daala,HeadhunterXamd/daala,nvoron23/daala,KyleSiefring/daala,kustom666/daala,felipebetancur/daala,luctrudeau/daala,jmvalin/daala,jmvalin/daala,luctrudeau/daala,tribouille/daala,kodabb/daala,ascent12/daala,xiph/daala,kustom666/daala,HeadhunterXamd/daala,felipebetancur/daala,nvoron23/daala,xiphmont/daala,ascent12/daala,luctrudeau/daala,ycho/daala,ycho/daala,nvoron23/daala,HeadhunterXamd/daala,ascent12/daala,KyleSiefring/daala,mbebenita/daala,kodabb/daala,iankronquist/daala,mbebenita/daala,xiphmont/daala,ascent12/daala,mbebenita/daala,KyleSiefring/daala,kodabb/daala,luctrudeau/daala,kodabb/daala,mbebenita/daala,HeadhunterXamd/daala,felipebetancur/daala,iankronquist/daala,xiph/daala,xiph/daala,jmvalin/daala,tribouille/daala,kustom666/daala,xiphmont/daala,kustom666/daala,jmvalin/daala,ycho/daala,KyleSiefring/daala,ascent12/daala,tribouille/daala,nvoron23/daala,xiphmont/daala,kodabb/daala,mbebenita/daala,KyleSiefring/daala,tribouille/daala,iankronquist/daala,ycho/daala,xiphmont/daala,jmvalin/daala,xiph/daala,iankronquist/daala,tribouille/daala