File frontline-underquoted-m4.patch of Package frontline

--- frontline.m4
+++ frontline.m4
@@ -4,7 +4,7 @@
 dnl AM_PATH_FRONTLINE([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
 dnl Test to see if libfrontline is installed, and define FRONTLINE_CFLAGS, LIBS
 dnl
-AC_DEFUN(AM_PATH_FRONTLINE,
+AC_DEFUN([AM_PATH_FRONTLINE],
 [dnl
 dnl Get the cflags and libraries from the frontline-config script
 dnl