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Free labels in context()

We know that labels only can be deleted at the end of functions, but
context is also called in compound statements. Ths solution is
check the current context and deleted labels inly in context 0.

--- a/cc1/cc1.h

+++ b/cc1/cc1.h

@@ -89,9 +89,6 @@

 	struct symbol *hash;

 };

-

-extern void freesyms(uint8_t ns);

-

 extern Type *qualifier(Type *tp, uint8_t qlf),

 	*ctype(int8_t type, int8_t sign, int8_t size),

 	*mktype(Type *tp, uint8_t op, uint16_t nelem);

--- a/cc1/decl.c

+++ b/cc1/decl.c

@@ -477,7 +477,6 @@

 				emitsframe(sym);

 				context(NULL, NULL, NULL);

 				emiteframe();

-				freesyms(NS_LABEL);

 				return;

 			}

 		} while (accept(','));

--- a/cc1/symbol.c

+++ b/cc1/symbol.c

@@ -27,7 +27,7 @@

 	return h & NR_SYM_HASH - 1;

 }

-void

+static void

 freesyms(uint8_t ns)

 {

 	static struct symtab *tbl;

@@ -66,6 +66,8 @@

 	--curctx;

 	freesyms(NS_IDEN);

 	freesyms(NS_TAG);

+	if (curctx == 0)

+		freesyms(NS_LABEL);

 }

 Symbol *

-- 

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