Fixed warning, small cleanup.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9139 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/drivers/common/zero.c

@@ -5,9 +5,11 @@
 
 
 #include <Drivers.h>
-#include <vm.h>
+#include <KernelExport.h>
+
 #include <string.h>
 
+
 #define DEVICE_NAME "zero"
 
 int32 api_version = B_CUR_DRIVER_API_VERSION;
@@ -63,7 +65,7 @@ zero_write(void *cookie, off_t pos, const void *buffer, size_t *_length)
 
 
 status_t
-init_hardware()
+init_hardware(void)
 {
 	return B_OK;
 }
@@ -108,14 +110,14 @@ find_device(const char *name)
 
 
 status_t
-init_driver()
+init_driver(void)
 {
 	return B_OK;
 }
 
 
 void
-uninit_driver()
+uninit_driver(void)
 {
 }