Partial fix to bug #2244 (ensure that pattern unification does not abstract over Meta's by first posing the Meta's as Evar's).
Partial fix to bug #2244 (ensure that pattern unification does not
abstract over Meta's by first posing the Meta's as Evar's).

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@12898 85f007b7-540e-0410-9357-904b9bb8a0f7

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