(rbs_spill_N): Fix off-by-one bug in indexing into next_func[].
(rbs_spill_N): Fix off-by-one bug in indexing into next_func[].

(Logical change 1.51)

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