bfdd: Prevent coverity from thinking values are uninited

Coverity is claiming that bfdd is able got have bglobal.bg_use_dplane
can be true, while dplane_addr can be uninitialized.  Not really
possible since global variables are initialized to all 0's.  In
any event.  Force it to think it can't go there.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

bfdd/bfdd.c

@@ -337,6 +337,8 @@ int main(int argc, char *argv[])
 	bool ctlsockused = false;
 	int opt;
 
+	bglobal.bg_use_dplane = false;
+
 	/* Initialize system sockets. */
 	bg_init();