unqual: unqualify_type() should check for null ctypes

It's possible that the input type is NULL, so add a check for it.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/evaluate.c b/evaluate.c
index c39f9ec7..fd84205c 100644
--- a/evaluate.c
+++ b/evaluate.c
@@ -63,6 +63,8 @@ static inline int valid_subexpr_type(struct expression *expr)
 
 static struct symbol *unqualify_type(struct symbol *ctype)
 {
+	if (!ctype)
+		return ctype;
 	if (ctype->type == SYM_NODE && (ctype->ctype.modifiers & MOD_QUALIFIER)) {
 		struct symbol *unqual = alloc_symbol(ctype->pos, 0);