no crash when display was wrong

1 files changed, 5 insertions, 0 deletions

diff --git a/x11vnc.c b/x11vnc.c
index 394631f..aaa4d27 100644
--- a/x11vnc.c
+++ b/x11vnc.c
@@ -243,6 +243,11 @@ int main(int argc,char** argv)
 
   if(dpy==0)
     dpy = XOpenDisplay("");
+  if(dpy==0) {
+    fprintf(stderr,"Couldn't open display!\n");
+    exit(2);
+  }
+     
   xscreen = DefaultScreen(dpy);
 
   init_keycodes();