Appease autohell wrath^Wwarnings about putting m4 stuff in a m4 subdir.

.gitignore

@@ -13,6 +13,7 @@ Makefile.in
 /missing
 /po/Makefile.in.in
 /configure.ac
+/m4/
 
 # Autotools files generated into builddir (for in-tree builds)
 Makefile

Makefile.am

 @SET_MAKE@
 
 AUTOMAKE_OPTIONS = subdir-objects
+ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 
 SUBDIRS = po
 

autogen.sh

@@ -17,4 +17,6 @@ EOF
   exit 1
 }
 
+test -d m4 || mkdir m4
+
 xdt-autogen $@

configure.ac.in

@@ -12,7 +12,7 @@ m4_define([xfce4_screenshooter_version_tag], [])
 m4_define([xfce4_screenshooter_version], [xfce4_screenshooter_version_major().xfce4_screenshooter_version_minor().xfce4_screenshooter_version_micro()ifelse(xfce4_screenshooter_version_nano(), [], [], [.xfce4_screenshooter_version_nano()])ifelse(xfce4_screenshooter_version_tag(), [git], [xfce4_screenshooter_version_tag()-xfce4_screenshooter_version_build()], [xfce4_screenshooter_version_tag()])])
 
 AC_INIT([xfce4-screenshooter], [xfce4_screenshooter_version], [http://bugzilla.xfce.org/], [xfce4-screenshooter])
-
+AC_CONFIG_MACRO_DIR([m4])
 dnl ***************************
 dnl *** Initialize automake ***
 dnl ***************************