Don't blow up if the external PATH variable is not set.
authorstevenknight <stevenknight@fdb21ef1-2011-0410-befe-b5e4ea1792b1>
Fri, 30 Jul 2004 19:07:46 +0000 (19:07 +0000)
committerstevenknight <stevenknight@fdb21ef1-2011-0410-befe-b5e4ea1792b1>
Fri, 30 Jul 2004 19:07:46 +0000 (19:07 +0000)
commitb0d344aed38a3fb8a2d9e1f2cb785405ef91b3b0
treed5e6c84204e3b36d2d1c413e00a9853312afb4fb
parentf85710849bf8724bc675ebe5844b1fedbdabb668
Don't blow up if the external PATH variable is not set.

git-svn-id: http://scons.tigris.org/svn/scons/trunk@1017 fdb21ef1-2011-0410-befe-b5e4ea1792b1
src/CHANGES.txt
src/engine/SCons/Util.py
src/engine/SCons/UtilTests.py