(ia64_get_stacked): Make sure returned rnat-location is valid, too.
(ia64_get_stacked): Make sure returned rnat-location is valid, too.

(Logical change 1.42)

atanasyan/libunwind,vtjnash/libunwind,frida/libunwind,CyanogenMod/android_external_libunwind,atanasyan/libunwind-android,tony/libunwind,androidarmv6/android_external_libunwind,bo-on-software/libunwind,pathscale/libunwind,tony/libunwind,vtjnash/libunwind,tkelman/libunwind,unkadoug/libunwind,dropbox/libunwind,CyanogenMod/android_external_libunwind,DroidSim/platform_external_libunwind,cloudius-systems/libunwind,atanasyan/libunwind-android,fdoray/libunwind,0xlab/0xdroid-external_libunwind,lat/libunwind,geekboxzone/lollipop_external_libunwind,dreal-deps/libunwind,dagar/libunwind,cloudius-systems/libunwind,android-ia/platform_external_libunwind,tronical/libunwind,frida/libunwind,wdv4758h/libunwind,vegard/libunwind,martyone/libunwind,bo-on-software/libunwind,Keno/libunwind,atanasyan/libunwind,geekboxzone/lollipop_external_libunwind,jrmuizel/libunwind,project-zerus/libunwind,igprof/libunwind,yuyichao/libunwind,wdv4758h/libunwind,igprof/libunwind,geekboxzone/lollipop_external_libunwind,Chilledheart/libunwind,cloudius-systems/libunwind,dreal-deps/libunwind,cms-externals/libunwind,Chilledheart/libunwind,project-zerus/libunwind,olibc/libunwind,libunwind/libunwind,zeldin/platform_external_libunwind,zeldin/platform_external_libunwind,lat/libunwind,vegard/libunwind,krytarowski/libunwind,olibc/libunwind,igprof/libunwind,libunwind/libunwind,androidarmv6/android_external_libunwind,joyent/libunwind,evaautomation/libunwind,evaautomation/libunwind,SyndicateRogue/libunwind,dagar/libunwind,rantala/libunwind,tkelman/libunwind,vegard/libunwind,djwatson/libunwind,dropbox/libunwind,rogwfu/libunwind,yuyichao/libunwind,libunwind/libunwind,unkadoug/libunwind,evaautomation/libunwind,Keno/libunwind,fillexen/libunwind,martyone/libunwind,olibc/libunwind,dropbox/libunwind,SyndicateRogue/libunwind,tronical/libunwind,Chilledheart/libunwind,rantala/libunwind,mpercy/libunwind,0xlab/0xdroid-external_libunwind,rantala/libunwind,dreal-deps/libunwind,bo-on-software/libunwind,androidarmv6/android_external_libunwind,geekboxzone/mmallow_external_libunwind,maltek/platform_external_libunwind,krytarowski/libunwind,tony/libunwind,android-ia/platform_external_libunwind,jrmuizel/libunwind,rntz/libunwind,zeldin/platform_external_libunwind,cms-externals/libunwind,adsharma/libunwind,atanasyan/libunwind,cms-externals/libunwind,joyent/libunwind,Keno/libunwind,adsharma/libunwind,maltek/platform_external_libunwind,rogwfu/libunwind,vtjnash/libunwind,zliu2014/libunwind-tilegx,adsharma/libunwind,tkelman/libunwind,fdoray/libunwind,martyone/libunwind,atanasyan/libunwind-android,wdv4758h/libunwind,DroidSim/platform_external_libunwind,CyanogenMod/android_external_libunwind,maltek/platform_external_libunwind,mpercy/libunwind,DroidSim/platform_external_libunwind,pathscale/libunwind,ehsan/libunwind,jrmuizel/libunwind,joyent/libunwind,ehsan/libunwind,rogwfu/libunwind,rntz/libunwind,djwatson/libunwind,project-zerus/libunwind,ehsan/libunwind,mpercy/libunwind,geekboxzone/mmallow_external_libunwind,zliu2014/libunwind-tilegx,frida/libunwind,SyndicateRogue/libunwind,lat/libunwind,dagar/libunwind,rntz/libunwind,zliu2014/libunwind-tilegx,fillexen/libunwind,fdoray/libunwind,0xlab/0xdroid-external_libunwind,krytarowski/libunwind,tronical/libunwind,fillexen/libunwind,djwatson/libunwind,android-ia/platform_external_libunwind,unkadoug/libunwind,pathscale/libunwind,yuyichao/libunwind,geekboxzone/mmallow_external_libunwind