added missing library for build on OS X

Xmu seems to be missing

diff --git a/configure.ac b/configure.ac
index c0121e5..ba82cc2 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -331,7 +331,7 @@ dnl| USE_PTYS=1
 
 dnl| add some libs for OS X
   *-apple-* )
-    X_LIBS="$X_LIBS -lX11 -lXt"    
+    X_LIBS="$X_LIBS -lXmu -lX11 -lXt "    
   ;;
 esac