--- a/tree_cmd.c	Wed Feb 01 16:17:08 2006 +0000
+++ b/tree_cmd.c	Wed Feb 01 19:53:17 2006 +0000
@@ -581,9 +581,9 @@
 		int m2;
 
 		switch (ct) {
-			case CL_GRASS: m2 = 0;
-			case CL_ROUGH: m2 = 0x10;
-			default:       m2 = (GetClearDensity(tile) << 6) | 0x20;
+			case CL_GRASS: m2 = 0; break;
+			case CL_ROUGH: m2 = 0x10; break;
+			default:       m2 = (GetClearDensity(tile) << 6) | 0x20; break;
 		}
 
 		ModifyTile(tile,