(AC_PATH_X): Check not only $no_x, also check if

$x_includes and $x_libraries are empty before adding new flags.

Rev: ChangeLog:1.527.2.8
Rev: configure.ac:1.12.2.2

ChangeLog

+2004-07-11  Niels Mller  <nisse@lysator.liu.se>
+        Copied 2003-01-14 fix from the head branch:
+
+	* configure.ac (AC_PATH_X): Check not only $no_x, also check if
+	$x_includes and $x_libraries are empty before adding new flags.
+
 2003-09-20  Niels Mller  <nisse@cuckoo.hack.org>
 
 	* Released lsh-1.4.3.

configure.ac

@@ -406,9 +406,13 @@ fi
 AC_PATH_X
 
 if test -z "$no_x" ; then
+  if test -n "$x_includes" ; then
     CPPFLAGS="$CPPFLAGS -I$x_includes"
+  fi
+  if test -n "$x_libraries" ; then
     LDFLAGS="$LDFLAGS -L$x_libraries"
     LSH_RPATH_ADD($x_libraries)
+  fi
 fi
 
 AC_CHECK_HEADERS(X11/Xauth.h)