Fix configure test for Xpm

Problem reported by Ashish Shukla in
https://lists.gnu.org/archive/html/emacs-devel/2017-09/msg00020.html.
* configure.ac (HAVE_XPM) [HAVE_X11]: Include X11/xpm.h instead of
noX/xpm.h in configure test.

1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 2e0b416053b..250a51725b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3364,7 +3364,7 @@ if test "${HAVE_X11}" = "yes"; then
       AC_CACHE_CHECK([for XpmReturnAllocPixels preprocessor define],
       [emacs_cv_cpp_xpm_return_alloc_pixels],
       [AC_EGREP_CPP(no_return_alloc_pixels,
-      [#include "noX/xpm.h"
+      [#include "X11/xpm.h"
 #ifndef XpmReturnAllocPixels
 no_return_alloc_pixels
 #endif