X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=drawing.c;h=a10a7f06d68553c827347c7e249c704cc8fea272;hb=db313b3948d27244dd7c34c2609c66d6204d8931;hp=7f4a6cf6746eabdea9fba7a63f6d9b9900ef35d0;hpb=9cd182ffa92e97609d562883a1c8e74949963ba0;p=sgt-puzzles.git

diff --git a/drawing.c b/drawing.c
index 7f4a6cf..a10a7f0 100644
--- a/drawing.c
+++ b/drawing.c
@@ -90,6 +90,8 @@ void draw_line(drawing *dr, int x1, int y1, int x2, int y2, int colour)
 void draw_thick_line(drawing *dr, float thickness,
 		     float x1, float y1, float x2, float y2, int colour)
 {
+    if (thickness < 1.0)
+        thickness = 1.0;
     if (dr->api->draw_thick_line) {
 	dr->api->draw_thick_line(dr->handle, thickness,
 				 x1, y1, x2, y2, colour);