Solids wall description, and check build_save was successful when saving a stamp

1 files changed, 2 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index 5abc139..036bdf1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -402,6 +402,8 @@ void stamp_save(int x, int y, int w, int h)
 	int n;
 	char fn[64], sn[16];
 	void *s=build_save(&n, x, y, w, h, bmap, vx, vy, pv, fvx, fvy, signs, parts);
+	if (!s)
+		return;
 
 #ifdef WIN32
 	_mkdir("stamps");