Added SwitchToThread.

diff --git a/dlls/kernel/kernel_main.c b/dlls/kernel/kernel_main.c
index b3318d6..2469103 100644
--- a/dlls/kernel/kernel_main.c
+++ b/dlls/kernel/kernel_main.c
@@ -155,3 +155,9 @@
 {
     return 0;
 }
+
+BOOL WINAPI SwitchToThread(VOID)
+{
+    Sleep(0);
+    return 1;
+}