rv is only used in an assert.
rv is only used in an assert.

The assert only evaluates to code if NDEBUG is undefined. Protect rv and its use accordingly

Issue reported by Joerg Mayer
https://code.wireshark.org/review/8260

bxshi/nghttp2,icing/nghttp2,serioussam/nghttp2,shines77/nghttp2,minhoryang/nghttp2,kelbyludwig/nghttp2,yuki-kodama/nghttp2,minhoryang/nghttp2,syohex/nghttp2,icing/nghttp2,dxq-git/nghttp2,syohex/nghttp2,thinred/nghttp2,icing/nghttp2,ohyeah521/nghttp2,mixianghang/nghttp2,kelbyludwig/nghttp2,yuki-kodama/nghttp2,wzyboy/nghttp2,kelbyludwig/nghttp2,wzyboy/nghttp2,ohyeah521/nghttp2,thinred/nghttp2,thinred/nghttp2,shines77/nghttp2,serioussam/nghttp2,mixianghang/nghttp2,bxshi/nghttp2,wzyboy/nghttp2,yuki-kodama/nghttp2,icing/nghttp2,mixianghang/nghttp2,minhoryang/nghttp2,syohex/nghttp2,lukw00/nghttp2,wzyboy/nghttp2,serioussam/nghttp2,dxq-git/nghttp2,syohex/nghttp2,serioussam/nghttp2,wzyboy/nghttp2,shines77/nghttp2,lukw00/nghttp2,syohex/nghttp2,ohyeah521/nghttp2,kelbyludwig/nghttp2,thinred/nghttp2,yuki-kodama/nghttp2,ohyeah521/nghttp2,serioussam/nghttp2,lukw00/nghttp2,mixianghang/nghttp2,bxshi/nghttp2,ohyeah521/nghttp2,kelbyludwig/nghttp2,icing/nghttp2,yuki-kodama/nghttp2,shines77/nghttp2,bxshi/nghttp2,minhoryang/nghttp2,shines77/nghttp2,serioussam/nghttp2,lukw00/nghttp2,icing/nghttp2,lukw00/nghttp2,thinred/nghttp2,ohyeah521/nghttp2,serioussam/nghttp2,minhoryang/nghttp2,icing/nghttp2,wzyboy/nghttp2,kelbyludwig/nghttp2,mixianghang/nghttp2,dxq-git/nghttp2,mixianghang/nghttp2,dxq-git/nghttp2,thinred/nghttp2,dxq-git/nghttp2,yuki-kodama/nghttp2,dxq-git/nghttp2,lukw00/nghttp2,wzyboy/nghttp2,shines77/nghttp2,lukw00/nghttp2,minhoryang/nghttp2,bxshi/nghttp2,bxshi/nghttp2,syohex/nghttp2,thinred/nghttp2