Do not assume we can include fnmatch.h

Signed-off-by: Rink Springer <rink@rink.nu>

diff --git a/src/expand.c b/src/expand.c
index 2a50830..1ab5757 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -45,7 +45,9 @@
 #include <inttypes.h>
 #include <limits.h>
 #include <string.h>
+#ifdef HAVE_FNMATCH
 #include <fnmatch.h>
+#endif
 #ifdef HAVE_GLOB
 #include <glob.h>
 #endif