Ensure MIN/MAX overrides

Marlin/src/core/minmax.h

@@ -20,13 +20,14 @@
  *
  */
 
-#pragma once
-
 #undef MIN
 #undef MAX
 
 #ifdef __cplusplus
 
+  #ifndef _MINMAX_H_
+  #define _MINMAX_H_
+
     extern "C++" {
 
       // C++11 solution that is standards compliant. Return type is deduced automatically
@@ -41,6 +42,8 @@
 
     }
 
+  #endif
+
 #else
 
   // NUM_ARGS(...) evaluates to the number of arguments

Marlin/src/inc/MarlinConfig.h

@@ -43,5 +43,6 @@
 #include "../core/language.h"
 #include "../core/utility.h"
 #include "../core/serial.h"
+#include "../core/minmax.h"
 
 #endif // _MARLIN_CONFIG_H_

frameworks/CMSIS/LPC1768/include/lpc_types.h

@@ -145,8 +145,6 @@ typedef int32_t(*PFI)();
 /* External data/function define */
 #define EXTERN extern
 
-#include "../../../../src/core/minmax.h"
-
 /**
  * @}
  */