Implement resolution switching in common console code.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4812 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/vl.c b/vl.c
index d6da115..84eab32 100644
--- a/vl.c
+++ b/vl.c
@@ -7935,7 +7935,7 @@
     kernel_cmdline = "";
     cyls = heads = secs = 0;
     translation = BIOS_ATA_TRANSLATION_AUTO;
-    monitor_device = "vc:800x600";
+    monitor_device = "vc";
 
     serial_devices[0] = "vc:80Cx24C";
     for(i = 1; i < MAX_SERIAL_PORTS; i++)