Autotools: Quote AC_SUBST arguments

Author: petk

configure.ac

@@ -1438,18 +1438,18 @@ exec_prefix=$old_exec_prefix
 libdir=$old_libdir
 datadir=$old_datadir
 
-AC_SUBST(INCLUDE_PATH)
-AC_SUBST(EXPANDED_PEAR_INSTALLDIR)
-AC_SUBST(EXPANDED_EXTENSION_DIR)
-AC_SUBST(EXPANDED_BINDIR)
-AC_SUBST(EXPANDED_SBINDIR)
-AC_SUBST(EXPANDED_MANDIR)
-AC_SUBST(EXPANDED_LIBDIR)
-AC_SUBST(EXPANDED_DATADIR)
-AC_SUBST(EXPANDED_SYSCONFDIR)
-AC_SUBST(EXPANDED_LOCALSTATEDIR)
-AC_SUBST(EXPANDED_PHP_CONFIG_FILE_PATH)
-AC_SUBST(EXPANDED_PHP_CONFIG_FILE_SCAN_DIR)
+AC_SUBST([INCLUDE_PATH])
+AC_SUBST([EXPANDED_PEAR_INSTALLDIR])
+AC_SUBST([EXPANDED_EXTENSION_DIR])
+AC_SUBST([EXPANDED_BINDIR])
+AC_SUBST([EXPANDED_SBINDIR])
+AC_SUBST([EXPANDED_MANDIR])
+AC_SUBST([EXPANDED_LIBDIR])
+AC_SUBST([EXPANDED_DATADIR])
+AC_SUBST([EXPANDED_SYSCONFDIR])
+AC_SUBST([EXPANDED_LOCALSTATEDIR])
+AC_SUBST([EXPANDED_PHP_CONFIG_FILE_PATH])
+AC_SUBST([EXPANDED_PHP_CONFIG_FILE_SCAN_DIR])
 AC_SUBST([PHP_INSTALLED_SAPIS])
 AC_SUBST([SAPI_LIBNAME_SHARED])
 AC_SUBST([SAPI_LIBNAME_STATIC])