(svn r27793) -Fix [FS#6450]: Use of uninitialised variable cause lzo to fail. Add check for error status.

src/saveload/saveload.cpp

@@ -1994,7 +1994,7 @@ struct LZOLoadFilter : LoadFilter {
 		byte out[LZO_BUFFER_SIZE + LZO_BUFFER_SIZE / 16 + 64 + 3 + sizeof(uint32) * 2];
 		uint32 tmp[2];
 		uint32 size;
-		lzo_uint len;
+		lzo_uint len = ssize;
 
 		/* Read header*/
 		if (this->chain->Read((byte*)tmp, sizeof(tmp)) != sizeof(tmp)) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE, "File read failed");
@@ -2016,7 +2016,8 @@ struct LZOLoadFilter : LoadFilter {
 		if (tmp[0] != lzo_adler32(0, out, size + sizeof(uint32))) SlErrorCorrupt("Bad checksum");
 
 		/* Decompress */
-		lzo1x_decompress_safe(out + sizeof(uint32) * 1, size, buf, &len, NULL);
+		int ret = lzo1x_decompress_safe(out + sizeof(uint32) * 1, size, buf, &len, NULL);
+		if (ret != LZO_E_OK) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_READABLE);
 		return len;
 	}
 };