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Pass a storage class parameter to declaration

This parameter simplifies all the logic of the code later.

--- a/cc2/parser.c

+++ b/cc2/parser.c

@@ -381,7 +381,7 @@

 }

 static Symbol *

-declaration(uint8_t t, char *token)

+declaration(uint8_t t, char class, char *token)

 {

 	static Symbol *(*tbl[3])(char *)= {

 		[LOCAL] = local,

@@ -397,7 +397,7 @@

 		free(sym->name);

 	memset(sym, 0, sizeof(*sym));

 	sym->type = VAR;

-	sym->u.v.sclass = token[0];

+	sym->u.v.sclass = class;

 	if ((s = strtok(NULL, "\t")) == NULL)

 		error(ESYNTAX);

@@ -411,7 +411,7 @@

 static void

 globdcl(char *token)

 {

-	Symbol *sym = declaration(GLOBAL, token);

+	Symbol *sym = declaration(GLOBAL, MEM, token);

 	switch (token[0]) {

 	case 'X':

@@ -439,7 +439,7 @@

 static void

 paramdcl(char *token)

 {

-	Symbol *sym = declaration(PARAMETER, token);

+	Symbol *sym = declaration(PARAMETER, AUTO, token);

 	sym->next = curfun->u.f.pars;

 	curfun->u.f.pars = sym;

 }

@@ -447,7 +447,7 @@

 static void

 localdcl(char *token)

 {

-	Symbol *sym = declaration(LOCAL, token);

+	Symbol *sym = declaration(LOCAL, token[0], token);

 	sym->next = curfun->u.f.vars;

 	curfun->u.f.vars = sym;

 }