fix silent taskkill (makefile runs with unix shell)

Makefile

@@ -152,7 +152,7 @@ build_pass_4: $(MODULES:%=%.$(MODULE_EXT)) kill_exe_win
 
 kill_exe_win:
 ifdef SYSTEMROOT
-	-@taskkill /F /IM haxe.exe
+	-@taskkill /F /IM haxe.exe 2>/dev/null
 endif
 	
 plugin:

Makefile.win

@@ -6,7 +6,7 @@ EXTENSION=.exe
 PACKAGE_SRC_EXTENSION=.zip
 
 kill:
-	-@taskkill /F /IM haxe.exe 2>NUL
+	-@taskkill /F /IM haxe.exe
 
 # allow Ocaml/Mingw as well
 NATIVE_LIBS += -I "c:/program files/mingw/lib/"