Fix all warnings and enable -Werror for gptfdisk.

Bug: 26936282
Change-Id: Id7e9ec5e769e1abedc1d2e36bff2c5488b1c4b3e
diff --git a/crc32.cc b/crc32.cc
index d253dd9..5eca100 100644
--- a/crc32.cc
+++ b/crc32.cc
@@ -31,7 +31,7 @@
  */

 uint32_t chksum_crc32 (unsigned char *block, unsigned int length)

 {

-   register unsigned long crc;

+   unsigned long crc;

    unsigned long i;

 

    crc = 0xFFFFFFFF;