Replace use of deprecated C Standard library headers in C++ code.

Change-Id: I9fa6630c7e4bdb2897df34d417635d8c7d8253bc
Signed-off-by: Tyler Chatow <tchatow@gmail.com>
diff --git a/frc971/wpilib/ahal/WPIErrors.h b/frc971/wpilib/ahal/WPIErrors.h
index da72d00..482240c 100644
--- a/frc971/wpilib/ahal/WPIErrors.h
+++ b/frc971/wpilib/ahal/WPIErrors.h
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <stdint.h>
+#include <cstdint>
 
 #ifdef WPI_ERRORS_DEFINE_STRINGS
 #define S(label, offset, message)            \