[PATCH] ephyr: Avoid a segfault with 'DISPLAY= Xephy -glamor'

[Jon TURNEY]

ephyr_glamor_connect() returns NULL if we failed, but applying
xcb_connection_has_error() to NULL is not permitted.

Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
---
 hw/kdrive/ephyr/hostx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/kdrive/ephyr/hostx.c b/hw/kdrive/ephyr/hostx.c
index f64861b..15edce8 100644
--- a/hw/kdrive/ephyr/hostx.c
+++ b/hw/kdrive/ephyr/hostx.c
@@ -443,7 +443,7 @@ hostx_init(void)
     else
 #endif
         HostX.conn = xcb_connect(NULL, &HostX.screen);
-    if (xcb_connection_has_error(HostX.conn)) {
+    if (!HostX.conn || xcb_connection_has_error(HostX.conn)) {
         fprintf(stderr, "\nXephyr cannot open host display. Is DISPLAY set?\n");
         exit(1);
     }
-- 
2.1.4