Fix typos in comments and code (occured -> occurred and related)

The code changed here is an unused data type name (evt_flush_occurred).

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

cpu-exec.c

diff --git a/cpu-exec.c b/cpu-exec.c
index 2cdcdc5..1b20f7b 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -509,7 +509,7 @@
                        jump normally, then does the exception return when the
                        CPU tries to execute code at the magic address.
                        This will cause the magic PC value to be pushed to
-                       the stack if an interrupt occured at the wrong time.
+                       the stack if an interrupt occurred at the wrong time.
                        We avoid this by disabling interrupts when
                        pc contains a magic address.  */
                     if (interrupt_request & CPU_INTERRUPT_HARD