[Bugfix] Check return value from fbPictureInit


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3029 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/unix/xserver/hw/vnc/xvnc.cc b/unix/xserver/hw/vnc/xvnc.cc
index cc32bc0..1bc94a2 100644
--- a/unix/xserver/hw/vnc/xvnc.cc
+++ b/unix/xserver/hw/vnc/xvnc.cc
@@ -1107,7 +1107,7 @@
   
 #ifdef RENDER
     if (ret && Render) 
-	fbPictureInit (pScreen, 0, 0);
+	ret = fbPictureInit (pScreen, 0, 0);
 #endif
 
     if (!ret) return FALSE;