Don't use XRANDR 1.3 extensions if the server doesn't support them.

* src/xterm.h (struct x_display_info): Add fields to save XRANDR
version number.
* src/xfns.c (x_get_monitor_attributes): Save the version numbers
after querying the X server.
(x_get_monitor_attributes_xrandr): Don't use XRRGetOutputPrimary or
XRRGetScreenResourcesCurrent if the server doesn't support at least
RANDR version 1.3.  Conditionalize the code blocks on compiling
against library version 1.3 or better, rather than feature tests for
each function.
* configure.ac: Stop testing for those two functions.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/xterm.h b/src/xterm.h
index 06cd2e75a8b..8e1fc788bc1 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -459,6 +459,11 @@ struct x_display_info
   /* SM */
   Atom Xatom_SM_CLIENT_ID;
 
+#ifdef HAVE_XRANDR
+  int xrandr_major_version;
+  int xrandr_minor_version;
+#endif
+
 #ifdef USE_CAIRO
   XExtCodes *ext_codes;
 #endif