Add primary screen detection

The user may specify that a screen is primary with xrandr. Save this
information in ratpoison for future use.

The use of XRRGetOutputPrimary forces us to bump xrandr supported
revision from >=1.2 to >=1.3.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/data.h b/src/data.h
index eb662ce..08f1667 100644
--- a/src/data.h
+++ b/src/data.h
@@ -161,6 +161,7 @@ struct rp_global_screen
 struct xrandr_info {
   int output;
   int crtc;
+  int primary;
   struct sbuf* name;
 };