[PATCH] Print an error if typeof() lacks an argument

[Martin Nagy <mnagy@redhat.com>]

We weren't checking if the initializer isn't NULL, which caused sparse
to segfault later on when performing lazy evaluation in classify_type().

Signed-off-by: Martin Nagy <nagy.martin@gmail.com>
---
 parse.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/parse.c b/parse.c
index 9662122..18cfaef 100644
--- a/parse.c
+++ b/parse.c
@@ -924,12 +924,17 @@ static struct token *typeof_specifier(struct token *token, struct decl_state *ct
 		ctx->ctype.base_type = sym->ctype.base_type;
 		apply_ctype(token->pos, &sym->ctype, &ctx->ctype);
 	} else {
-		struct symbol *typeof_sym = alloc_symbol(token->pos, SYM_TYPEOF);
-		token = parse_expression(token->next, &typeof_sym->initializer);