Revert "engine: soundlib: wav: attempt to make FindNextChunk more safe"

This reverts commit 78e239d883.

engine/common/soundlib/snd_wav.c

@@ -62,14 +62,11 @@ FindNextChunk
 */
 static void FindNextChunk( const char *name )
 {
-	int remaining;
-
 	while( 1 )
 	{
 		iff_dataPtr = iff_lastChunk;
-		remaining = iff_end - iff_dataPtr;
 
-		if( remaining < 8 )
+		if( iff_dataPtr >= iff_end )
 		{
 			// didn't find the chunk
 			iff_dataPtr = NULL;
@@ -79,24 +76,14 @@ static void FindNextChunk( const char *name )
 		iff_dataPtr += 4;
 		iff_chunkLen = GetLittleLong();
 
-		remaining -= 8;
-
 		if( iff_chunkLen < 0 )
 		{
 			iff_dataPtr = NULL;
 			return;
 		}
 
-		if( iff_chunkLen > remaining )
-		{
-			iff_chunkLen = remaining;
-		}
-
-		remaining -= iff_chunkLen;
 		iff_dataPtr -= 8;
-		iff_lastChunk = iff_dataPtr + 8 + iff_chunkLen;
-		if( iff_chunkLen & 1 && remaining )
-			iff_chunkLen++;
+		iff_lastChunk = iff_dataPtr + 8 + ((iff_chunkLen + 1) & ~1);
 
 		if( !Q_strncmp( (const char *)iff_dataPtr, name, 4 ))
 			return;