op_reg_common.h: Refactor variable for safety

This patch changes the variable that tells how many common bits there
are to instead be +1 that value, so bits won't get reused.  A later
commit will renumber the bits in op.h and regexp.h, but for now things
are left as-is there, which means the base variables in those two files
must subtract one to compensate for the +1

1 files changed, 1 insertions, 1 deletions

diff --git a/regexp.h b/regexp.h
index ec897881e3..5246c1231e 100644
--- a/regexp.h
+++ b/regexp.h
@@ -291,7 +291,7 @@ and check for NULL.
  *
  */
 
-#define RXf_BASE_SHIFT _RXf_PMf_SHIFT
+#define RXf_BASE_SHIFT ((_RXf_PMf_SHIFT_NEXT)-1)
 
 /* Anchor and GPOS related stuff */
 #define RXf_ANCH_BOL    	(1<<(RXf_BASE_SHIFT+3))