load_it: fix bad merge of PR #64

Author: sezero

src/load_it.cpp

@@ -1293,7 +1293,7 @@ DWORD ITUnpack8Bit(signed char *pSample, DWORD dwLen, LPBYTE lpMemFile, DWORD dw
 			dwPos++;
 			writePos += channels;
 		Next:
-			if (pSrc >= pStop + 1) return(pStop - lpMemFile);
+			if (pSrc >= pStop + 1) return (DWORD)(pSrc - lpMemFile);
 		} while (dwPos < d);
 		// Move On
 		wCount -= d;
@@ -1379,13 +1379,11 @@ DWORD ITUnpack16Bit(signed char *pSample, DWORD dwLen, LPBYTE lpMemFile, DWORD d
 			dwPos++;
 			writePos += channels;
 		Next:
-			if (pSrc >= pStop + 1) return(pStop - lpMemFile);
+			if (pSrc >= pStop + 1) return (DWORD)(pSrc - lpMemFile);
 		} while (dwPos < d);
 		// Move On
 		wCount -= d;
 		dwLen -= d;
-
-		pDst += d;
 		if (pSrc >= pStop) break;
 	}
 	return (DWORD)(pSrc - lpMemFile);