[newlib-cygwin/cygwin-acl] Fix potential endless loop in pending_signals::clear

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=179415a9d7d473bbba17744abc7769db0f6462e8 commit 179415a9d7d473bbba17744abc7769db0f6462e8 Author: Corinna Vinschen Date: Tue Nov 3 18:25:23 2015 +0100 Fix potential endless loop in pending_signals::clear

[newlib-cygwin] Fix potential endless loop in pending_signals::clear

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=0ed1523470ba33a2afba1510a19e51c4af9e329a commit 0ed1523470ba33a2afba1510a19e51c4af9e329a Author: Corinna Vinschen Date: Tue Nov 3 18:25:23 2015 +0100 Fix potential endless loop in pending_signals::clear