(svn r16455) -Fix: don't crash when a newgrf has sounds in an unsupported sound format

src/newgrf_sound.cpp

@@ -9,6 +9,7 @@
 #include "vehicle_base.h"
 #include "sound_func.h"
 #include "core/smallvec_type.hpp"
+#include "core/mem_func.hpp"
 
 static SmallVector<SoundEntry, ORIGINAL_SAMPLE_COUNT> _sounds;
 
@@ -16,7 +17,9 @@ static SmallVector<SoundEntry, ORIGINAL_SAMPLE_COUNT> _sounds;
 /* Allocate a new Sound */
 SoundEntry *AllocateSound()
 {
-	return _sounds.Append();
+	SoundEntry *sound = _sounds.Append();
+	MemSetT(sound, 0);
+	return sound;
 }