Fix right limit of piano placement in bounce world edge
It was slightly beyond the right bounce edge.
--- a/hedgewars/uGearsHandlersMess.pas Mon Apr 01 17:35:07 2019 +0200
+++ b/hedgewars/uGearsHandlersMess.pas Mon Apr 01 18:49:08 2019 +0200
@@ -5255,7 +5255,7 @@
if (WorldEdge = weBounce) then
if (hwRound(Gear^.X) - Gear^.Radius < leftX) then
valid := false
- else if (hwRound(Gear^.X) - Gear^.Radius > rightX) then
+ else if (hwRound(Gear^.X) + Gear^.Radius > rightX) then
valid := false;
if (not valid) then