yacc: NULL-before-free check

[Michael W. Bombardieri]

Hi,

In yacc(1) remove one null check before free().
This has previously been done for other files so
this instance in get_line() was probably missed.

Older example:
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/yacc/output.c?f=h#rev1.25

- Michael


Index: reader.c
===================================================================
RCS file: /cvs/src/usr.bin/yacc/reader.c,v
retrieving revision 1.34
diff -u -p -u -r1.34 reader.c
--- reader.c    25 May 2017 20:11:03 -0000      1.34
+++ reader.c    8 Aug 2017 00:43:17 -0000
@@ -128,10 +128,8 @@ get_line(void)
        int c, i;
 
        if (saw_eof || (c = getc(f)) == EOF) {
-               if (line) {
-                       free(line);
-                       line = 0;
-               }
+               free(line);
+               line = NULL;
                cptr = 0;
                saw_eof = 1;
                return;