Fixed some issues found by winapi_check.

diff --git a/dlls/kernel/kernel_main.c b/dlls/kernel/kernel_main.c
index 2469103..1a05ba1 100644
--- a/dlls/kernel/kernel_main.c
+++ b/dlls/kernel/kernel_main.c
@@ -156,7 +156,11 @@
     return 0;
 }
 
-BOOL WINAPI SwitchToThread(VOID)
+/***********************************************************************
+ *		SwitchToThread (KERNEL32.@)
+ */
+
+BOOL WINAPI SwitchToThread(void)
 {
     Sleep(0);
     return 1;