Attn: pkgconfig maintainer

[Max Bowsher]

/usr/share/aclocal/pkg.m4:5: warning: underquoted definition of 
PKG_CHECK_MODULES
 run info '(automake)Extending aclocal'
 or see 
http://sources.redhat.com/automake/automake.html#Extending%20aclocal

Could this be fixed and pushed upstream, please?
It's just a simple matter of:
- AC_DEFUN(PKG_CHECK_MODULES, [
+ AC_DEFUN([PKG_CHECK_MODULES], [
Max.