In perly.y, change PL_parser to parser

All these code snippets are embedded inside a function
(perly.c:yyparse) that puts the current value of PL_parser in a local
variable named parser.  So the two are equivalent, but the latter
only has to access a local variable.

Before:

$ ls -ld perly.o
-rw-r--r--  1 sprout  staff  94748 Aug 22 06:12 perly.o

After:

$ ls -ld perly.o
-rw-r--r--  1 sprout  staff  94340 Aug 22 06:15 perly.o

1 files changed, 1 insertions, 1 deletions

diff --git a/perly.h b/perly.h
index 874d120b99..395ff5a4b7 100644
--- a/perly.h
+++ b/perly.h
@@ -256,6 +256,6 @@ typedef union YYSTYPE
 
 
 /* Generated from:
- * 83084fd3dca0e3c3a6f15a4ebdb137fc8ab3aa93ca0f1c04ea06228ac4ea79c3 perly.y
+ * 39b6174c4729deec2a6ee4698d7dcd6496acb0a8f063daf726d1f853d4dcb54e perly.y
  * d1d4df7b8e30ac9dede664af9179e6e5e7ddc7f2ad9c4eff9e2e5b32c9e16a6e regen_perly.pl
  * ex: set ro: */