Missing the include of <stdint.h> in btree.h

[GoogleCodeExporter]

Fix:

--- cpp-btree-1.0.1/btree.h 2013-02-06 14:18:00.000000000 +0800
+++ cpp-btree-1.0.1-non-c++11/btree.h   2013-04-08 12:17:40.000000000 +0800
@@ -100,8 +100,10 @@
 #ifndef UTIL_BTREE_BTREE_H__
 #define UTIL_BTREE_BTREE_H__

 #include <assert.h>
 #include <stddef.h>
+#include <stdint.h>
 #include <string.h>
 #include <sys/types.h>
 #include <algorithm>

Original issue reported on code.google.com by chen3feng on 8 Apr 2013 at 5:04