Replace worthless ores with rubble

Reported by:    Rick Tanner

git-svn-id: svn://svn.code.sf.net/p/crossfire/code/maps/trunk@19588 282e977c-c81d-0410-88c4-b93c2d0d6712

wolfsburg/volcano/heimser_hut_2

@@ -9,7 +9,7 @@ enter_x 9
 enter_y 1
 msg
 Created:  2008-01-12 lauwenmark
-Modified: 2012-04-02 Rick Tanner
+Modified: 2014-06-30 Kevin Zheng
 endmsg
 maplore
 This map is part of the Quest of the Two Heimser Brothers.
@@ -553,7 +553,7 @@ arch dirtfloor
 x 8
 y 6
 end
-arch worthlessoresmall_r
+arch rubble
 x 8
 y 6
 end
@@ -561,7 +561,7 @@ arch dirtfloor
 x 8
 y 7
 end
-arch worthlessoresmall_y
+arch rubble
 x 8
 y 7
 end
@@ -618,7 +618,7 @@ arch dirtfloor
 x 9
 y 6
 end
-arch worthlessoresmall_y
+arch rubble
 x 9
 y 6
 end