[HACKERS] compile warnings on cygwin - make check fails

[Andrew Dunstan]

CVS tip   WinXP/cygwin/gcc version 3.3.1 (cygming special)   gives these   tablecmds.c:3528: warning: dereferencing type-punned pointer will break strict-aliasing rules execQual.c:749: warning: dereferencing type-punned pointer will break strict-aliasing rules execQual.c:995: warning: dereferencing type-punned pointer will break strict-aliasing rules pg_shmem.c:368: warning: passing arg 1 of `shmdt' from incompatible pointer type proc.c:1016: warning: dereferencing type-punned pointer will break strict-aliasing rules proc.c:1057: warning: dereferencing type-punned pointer will break strict-aliasing rules proc.c:1123: warning: dereferencing type-punned pointer will break strict-aliasing rules command.c:1283: warning: dereferencing type-punned pointer will break strict-aliasing rules   make check fails (hangs) consistently on parallel tests   max_connections set to 100, shared_buffers set to 1000 by initdb (CVS version, not mine).   cheers   andrew