From dda6df668a23cc5c0bb9225f6693b862a3e53d1c Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn
Date: Thu, 21 Apr 2011 22:13:09 +0200
Subject: SCI: Avoid (unused) sqrt of a negative number

This fixes bug #3289799.
---
 engines/sci/engine/kmovement.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'engines/sci/engine')

diff --git a/engines/sci/engine/kmovement.cpp b/engines/sci/engine/kmovement.cpp
index f93a6716b9..f4392df8f2 100644
--- a/engines/sci/engine/kmovement.cpp
+++ b/engines/sci/engine/kmovement.cpp
@@ -128,7 +128,7 @@ reg_t kSetJump(EngineState *s, int argc, reg_t *argv) {
 	debugC(kDebugLevelBresen, "c: %d, tmp: %d", c, tmp);
 
 	// Compute x step
-	if (tmp != 0)
+	if (tmp != 0 && dx != 0)
 		vx = (int16)((float)(dx * sqrt(gy / (2.0 * tmp))));
 	else
 		vx = 0;
-- 
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