bug#14835: Makefile path bug

[Devon Sean McCullough]

Makefile fails to remove consecutive null paths.

                Peace
                        --Devon

P.S.  Spotted while failing to replicate unreported chown-not-found trouble.

P.P.S.  Here's the Makefile fix:

$ diff -Bbdu Makefile.in.~1~ Makefile.in
--- Makefile.in.~1~     2013-03-05 11:42:28.000000000 +0800
+++ Makefile.in 2013-07-10 02:56:09.000000000 +0800
@@ -282,7 +282,7 @@
 
 .PHONY: all ${SUBDIR} blessmail epaths-force FRC
 
-removenullpaths=sed -e 's/^://g' -e 's/:$$//g' -e 's/::/:/g'
+removenullpaths=sed -e 's/^::*//g' -e 's/::*$$//g' -e 's/:::*/:/g'
 
 # Generate epaths.h from epaths.in.  This target is invoked by `configure'.
 # See comments in configure.ac for why it is done this way, as opposed