R1024 - Eyes of the Overworld effect delayed

The effect of the EOTO did not take effect until the next move.
Added a vision_full_recalc as suggested to resolve the problem.

doc/fixes34.1

@@ -175,6 +175,8 @@ when using '/' to examine multiple map items in succession, don't mislabel
 martial arts kick that knocks a monster into a trap would result in warning
 	"dmonsfree: 1 removed doesn't match 2 pending" if the trap was fatal
 if you can't see or sense a monster when it dies, don't set dknown on corpse
+effect of wearing or removing the Eyes of the Overworld took effect on the
+	next move, but should take effect immediately.
 
 
 Platform- and/or Interface-Specific Fixes

src/artifact.c

@@ -439,6 +439,7 @@ long wp_mask;
 	    /* this assumes that no one else is using xray_range */
 	    if (on) u.xray_range = 3;
 	    else u.xray_range = -1;
+	    vision_full_recalc = 1;
 	}
 	if ((spfx & SPFX_REFLECT) && (wp_mask & W_WEP)) {
 	    if (on) EReflecting |= wp_mask;