Make header files compilable by itself to get two benefits:
- never have to worry about order of inclusion
- never have to figure out hidden dependencies in order to be
  able to include a file


git-svn-id: svn://svn.valgrind.org/vex/trunk@2546 8f6e269a-dfd6-0310-a8e1-e2731360e62c
diff --git a/priv/guest_s390_toIR.c b/priv/guest_s390_toIR.c
index 4ea8bb8..09b09b3 100644
--- a/priv/guest_s390_toIR.c
+++ b/priv/guest_s390_toIR.c
@@ -34,7 +34,7 @@
 
 #include "libvex_basictypes.h"
 #include "libvex_ir.h"
-#include "libvex.h"                  /* needed for bb_to_IR.h */
+#include "libvex_emnote.h"
 #include "libvex_s390x_common.h"
 #include "main_util.h"               /* vassert */
 #include "main_globals.h"            /* vex_traceflags */