(submit/miext-extinit) res: unexport noResExtension field

This field isn't used by any drivers, and also better belongs into
the corresponding extension instead of OS adaption layer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

Xext/xres.c

@@ -35,6 +35,8 @@
 #include "compint.h"
 #endif
 
+Bool noResExtension = FALSE;
+
 /** @brief Holds fragments of responses for ConstructClientIds.
  *
  *  note: there is no consideration for data alignment */