Todd C. Miller c47bb87f9f yacc.c: fix #definition of YYEMPTY ...

When generating a C parser, YYEMPTY is present in enum yytokentype but
there is no corresponding #define like there is for the other values.
There is a special case for YYEMPTY in b4_token_enums but no
corresponding case in b4_token_defines.

* data/skeletons/c.m4 (b4_token_defines): Do define YYEMPTY.

2020-11-11 08:47:21 +01:00

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