Fix NeL Tools compile under MinGW

code/nel/tools/3d/cluster_viewer/view_cs.cpp

@@ -38,7 +38,9 @@
 #include "nel/3d/event_mouse_listener.h"
 
 #ifdef NL_OS_WINDOWS
+#	ifndef NL_COMP_MINGW
 #		define NOMINMAX
+#	endif
 #	include <windows.h>
 #endif // NL_OS_WINDOWS
 

code/nel/tools/3d/shapes_exporter/main.cpp

@@ -20,7 +20,9 @@
 #include "shapes_exporter.h"
 
 #ifdef NL_OS_WINDOWS
+#	ifndef NL_COMP_MINGW
 #		define NOMINMAX
+#	endif
 #	include <windows.h>
 #endif // NL_OS_WINDOWS
 

code/nel/tools/3d/zviewer/zviewer.cpp

@@ -41,8 +41,10 @@
 #include <nel/3d/height_map.h>
 
 #ifdef NL_OS_WINDOWS
-	#define NOMINMAX
-	#include <windows.h>
+#	ifndef NL_COMP_MINGW
+#		define NOMINMAX
+#	endif
+#	include <windows.h>
 #endif // NL_OS_WINDOWS
 
 using namespace std;