$OpenBSD: patch-src_load_wav_cpp,v 1.1 2011/08/18 17:56:48 jasper Exp $

Fix integer overflow (SA45131/A)
From upstream git: 2d4c56de314ab13e4437bd8b609f0b751066eee8

--- src/load_wav.cpp.orig	Thu Aug 18 19:37:38 2011
+++ src/load_wav.cpp	Thu Aug 18 19:37:57 2011
@@ -54,7 +54,7 @@ BOOL CSoundFile::ReadWav(const BYTE *lpStream, DWORD d
 	if ((Patterns[1] = AllocatePattern(64, 4)) == NULL) return TRUE;
 	UINT samplesize = (pfmt->channels * pfmt->bitspersample) >> 3;
 	UINT len = pdata->length, bytelen;
-	if (dwMemPos + len > dwMemLength - 8) len = dwMemLength - dwMemPos - 8;
+	if (len > dwMemLength - 8 - dwMemPos) len = dwMemLength - dwMemPos - 8;
 	len /= samplesize;
 	bytelen = len;
 	if (pfmt->bitspersample >= 16) bytelen *= 2;