Use 'unsigned char' rather than 'char' for pchMessageStart.

Regarding https://bitcointalk.org/index.php?topic=28022.0

main.cpp has: "char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };"
Per discussion on the thread linked, leaving the signedness of
pchMessageStart is unsafe for values > 0x80. This patch specifies
'unsigned char' in main.cpp and net.h.

Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/net.h b/src/net.h
index 78055bfc69..6678e566a7 100644
--- a/src/net.h
+++ b/src/net.h
@@ -66,7 +66,7 @@ bool StopNode();
 //  (4) size
 //  (4) checksum
 
-extern char pchMessageStart[4];
+extern unsigned char pchMessageStart[4];
 
 class CMessageHeader
 {