Include inttypes.h instead of stdint.h (fixes issue299)

Many projects use inttypes.h, too. stdint.h isn't available everywhere, e.g.
on some versions of Solaris, while inttypes.h is available everywhere where
stdint.h is.

mercurial/bdiff.c

@@ -38,7 +38,7 b' static uint32_t htonl(uint32_t x)'
 #else
 #include <sys/types.h>
 #include <arpa/inet.h>
-#include <stdint.h>
+#include <inttypes.h>
 #endif
 
 struct line {

mercurial/mpatch.c

@@ -43,7 +43,7 b' static uint32_t ntohl(uint32_t x)'
 /* not windows */
 # include <sys/types.h>
 # include <arpa/inet.h>
-# include <stdint.h>
+# include <inttypes.h>
 #endif
 
 static char mpatch_doc[] = "Efficient binary patching.";