Added Packer::checkAlreadyPacked().

committer: mfx <mfx> 977427988 +0000

src/p_unix.cpp

@@ -68,9 +68,8 @@ bool PackUnix::canPack()
     // info: currently the header is 36 (32+4) bytes before EOF
     unsigned char buf[256];
     fi->seek(-(long)sizeof(buf), SEEK_END);
-    fi->readx(buf,sizeof(buf));
-    if (find_le32(buf,sizeof(buf),UPX_MAGIC_LE32) >= 0)  // note: always le32
-        throwAlreadyPacked();
+    fi->readx(buf, sizeof(buf));
+    checkAlreadyPacked(buf, sizeof(buf));
 
     return true;
 }