Patch to simplify is_open_canonical_projection (courtesy from François Garillot)
Patch to simplify is_open_canonical_projection
(courtesy from François Garillot)

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@14381 85f007b7-540e-0410-9357-904b9bb8a0f7

Zimmi48/coq,letouzey/coq-wip,Zimmi48/coq,Matafou/coq,JasonGross/coq,maximedenes/coq,letouzey/coq-wip,ale-f/coq,Ptival/coq,JasonGross/coq,pirapira/coq2rust,SkySkimmer/coq,ppedrot/coq,gmalecha/coq,ale-f/coq,maximedenes/coq,TOSPIO/coq,JasonGross/coq,gmalecha/coq,ppedrot/coq,letouzey/coq-wip,silene/coq,ppedrot/coq,Ptival/coq,jpdeplaix/coq,TOSPIO/coq,amintimany/coq,barras/coq,JasonGross/coq,TheTypoMaster/coq,ejgallego/coq,william-lawvere/coq,Zimmi48/coq,ejgallego/coq,letouzey/coq-wip,coq/coq,jhjourdan/coq,william-lawvere/coq,SkySkimmer/coq,Zimmi48/coq,silene/coq,herbelin/github-coq,silene/coq,gares/coq,pirapira/coq2rust,TheTypoMaster/coq,gares/coq,shindere/coq,gares/coq,mattam82/coq,shindere/coq,Lionel-Rieg/coq,maximedenes/coq,mlasson/coq,mattam82/coq,asr/coq,maximedenes/coq,Lionel-Rieg/coq,Ptival/coq,coq/coq,aspiwack/coq,pirbo/coq,Matafou/coq,shindere/coq,ppedrot/coq,jhjourdan/coq,Lionel-Rieg/coq,ejgallego/coq,letouzey/coq-wip,pirbo/coq,mattam82/coq,william-lawvere/coq,TheTypoMaster/coq,jhjourdan/coq,mlasson/coq,ejgallego/coq,8l/coq,SkySkimmer/coq,jpdeplaix/coq,herbelin/github-coq,mlasson/coq,gares/coq,amintimany/coq,jpdeplaix/coq,ppedrot/coq,amintimany/coq,TOSPIO/coq,coq/coq,pirapira/coq2rust,coq/coq,barras/coq,gmalecha/coq,8l/coq,gares/coq,maximedenes/coq,herbelin/github-coq,8l/coq,aspiwack/coq,SkySkimmer/coq,pirbo/coq,asr/coq,asr/coq,Matafou/coq,aspiwack/coq,ale-f/coq,barras/coq