freebsd: Fix logic error
freebsd: Fix logic error

When encountered vm map entry is not backed by a vnode, continue search
for matching entry instead of aborting the loop.

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