Fix potential buffer overflow in http_response_writer_print_int

src/core/transport/http/common/http_response_writer.c

@@ -149,7 +149,7 @@ axis2_http_response_writer_print_int(
     const axutil_env_t * env,
     int i)
 {
-    axis2_char_t int_str[10];
+    axis2_char_t int_str[12];
     sprintf(int_str, "%10d", i);
     return axis2_http_response_writer_print_str(response_writer, env, int_str);
 }