Change savex and savey in struct Summary to saverx and savery

This is a bit misleading otherwise, since it is the room coordinates,
not pixel coordinates.

desktop_version/src/Game.h

@@ -298,8 +298,8 @@ public:
         int seconds;
         int minutes;
         int hours;
-        int savex;
-        int savey;
+        int saverx;
+        int savery;
         int trinkets;
         bool finalmode;
         bool crewstats[numcrew];