Included <cstdio> for gcc-4.4 (issue 9)

src/exp.h

@@ -3,6 +3,7 @@
 #include "regex.h"
 #include <string>
 #include <ios>
+#include <cstdio>
 #include "stream.h"
 
 namespace YAML

src/parser.cpp

@@ -4,6 +4,7 @@
 #include "token.h"
 #include "exceptions.h"
 #include <sstream>
+#include <cstdio>
 
 namespace YAML
 {