avoid syntax-check (po-check) failure due to FP match on gettext.m4

* Makefile.maint (po-check): Exclude .m4 files.

ChangeLog

+Tue Jan  6 10:47:33 CET 2009 Jim Meyering <meyering@redhat.com>
+
+	avoid syntax-check (po-check) failure due to FP match on gettext.m4
+	* Makefile.maint (po-check): Exclude .m4 files.
+
 Tue Jan  6 10:45:04 CET 2009 Daniel Veillard <veillard@redhat.com>
 
 	* qemud/remote.c: fix compilation without SASL, patch by John Levon

Makefile.maint

@@ -558,6 +558,7 @@ po-check:
 	  files=;							\
 	  for file in $$($(VC_LIST_EXCEPT)); do				\
 	    case $$file in						\
+	      *.m4) continue;;						\
 	      *.?|*.??) ;;						\
 	      *) continue;;						\
 	    esac;							\