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[cc2] Fix initialization of parser variables

Curfun cannot be cleaned in endfun(), because then we lost the
begin of the function for all the code generators. Inpars()
was not correctly set, so any function could be loaded.

--- a/cc2/parser.c

+++ b/cc2/parser.c

@@ -613,7 +613,7 @@

 static void

 beginfun(void)

 {

-	inpars = 0;

+	inpars = 1;

 	pushctx();

 }

@@ -620,11 +620,6 @@

 static void

 endfun(void)

 {

-	Node *np;

-

-	np = newnode();

-	curfun = NULL;

-	inpars = 0; /* I know, it is a bit redundant */

 	endf = 1;

 }

@@ -634,7 +629,6 @@

 	cleannodes();  /* remove code of previous function */

 	popctx();  /* remove context of previous function */

 	curfun = NULL;

-	endf = 0;

 	while (!endf && nextline())

 		/* nothing */;