- Exhumed: Fixed CalcPosVel not initializing the vel parameter.

This caused spurious errors in OpenAL if the passed values were NANs or INFs.
Fixes #183

source/exhumed/src/sound.cpp

@@ -440,6 +440,8 @@ void EXSoundEngine::CalcPosVel(int type, const void* source, const float pt[3],
         }
         auto fcampos = GetSoundPos(&campos);
 
+        if (vel) vel->Zero();
+
         if (type == SOURCE_Ambient)
         {
             *pos = *(FVector3*)source;