target-ppc: fix a typo

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6088 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/target-ppc/exec.h b/target-ppc/exec.h
index ea37330..8db2bfa 100644
--- a/target-ppc/exec.h
+++ b/target-ppc/exec.h
@@ -27,7 +27,7 @@
 #include "cpu.h"
 #include "exec-all.h"
 
-/* Precise emulation is needed to correctly emulation exception flags */
+/* Precise emulation is needed to correctly emulate exception flags */
 #define USE_PRECISE_EMULATION 1
 
 register struct CPUPPCState *env asm(AREG0);