Fix depth detection anddisabling of XShm support. Now that we get
depth right, we no longer disable XShm though.

Lubomir Rintel <lkundrak@v3.sk>

--- koules1.4/xlib/init.c.shm	2007-10-28 02:37:54.000000000 +0200
+++ koules1.4/xlib/init.c	2007-10-28 02:38:49.000000000 +0200
@@ -374,32 +374,42 @@
 			    32, TrueColor, &vinfo_return) == True)
 	{
 	  useprivate = 0;
+#ifdef MITSHM
 	  bpp = 4;
+#endif
 	}
       else if (XMatchVisualInfo (dp, DefaultScreen (dp),
 				 24, TrueColor, &vinfo_return) == True)
 	{
 	  useprivate = 0;
+#ifdef MITSHM
 	  bpp = 4;
+#endif
 	}
       else if (XMatchVisualInfo (dp, DefaultScreen (dp),
 				 16, TrueColor, &vinfo_return) == True)
 	{
 	  useprivate = 0;
+#ifdef MITSHM
 	  bpp = 2;
+#endif
 	}
       else if (XMatchVisualInfo (dp, DefaultScreen (dp),
 				 15, TrueColor, &vinfo_return) == True)
 	{
 	  useprivate = 0;
+#ifdef MITSHM
 	  bpp = 2;
+#endif
 	}
       else if (XMatchVisualInfo (dp, DefaultScreen (dp),
 				 8, GrayScale, &vinfo_return) == True)
 	{
 	  useprivate = 0;
 	  monochrome = 1;
+#ifdef MITSHM
 	  bpp = 2;
+#endif
 	}
       else
 	{
@@ -411,8 +427,11 @@ initialize (char **argv, int argc)
 	}
     }
   else
+#ifdef MITSHM
     bpp = 1;
-  depth = vinfo_return.depth;
+#endif
+  if (depth = vinfo_return.depth > 24)
+    depth = 24;
 #ifdef MITSHM
   /* Make sure all is destroyed if killed off */