a button appears when player not visible; fixed space-centering

graph.cpp

@@ -5653,6 +5653,9 @@ void normalscreen() {
     displayButton(vid.xres-8, vid.yres-vid.fsize, XLAT("(v) menu"), 'v', 16);
   keyhandler = handleKeyNormal;
 
+  if(!playerfound)
+    displayButton(vid.xcenter, vid.ycenter, XLAT(mousing ? "find the player" : "press SPACE to find the player"), ' ', 8);
+
   describeMouseover();
   }
 

hypgraph.cpp

@@ -889,6 +889,7 @@ void fullcenter() {
     resetview();
     drawthemap();
     centerpc(INF);
+    centerover = cwt.at;
     }
   playermoved = true;
   }