Merge pull request #155 from v0-e/td-null-check-fix

SEQUENCE_free, CHOICE_free null pointer check fix

skeletons/constr_CHOICE.c

@@ -156,13 +156,14 @@ CHOICE_constraint(const asn_TYPE_descriptor_t *td, const void *sptr,
 void
 CHOICE_free(const asn_TYPE_descriptor_t *td, void *ptr,
             enum asn_struct_free_method method) {
-    const asn_CHOICE_specifics_t *specs =
-        (const asn_CHOICE_specifics_t *)td->specifics;
+    const asn_CHOICE_specifics_t *specs;
     unsigned present;
 
 	if(!td || !ptr)
 		return;
 
+    specs = (const asn_CHOICE_specifics_t *)td->specifics;
+
 	ASN_DEBUG("Freeing %s as CHOICE", td->name);
 
 	/*

skeletons/constr_SEQUENCE.c

@@ -68,13 +68,14 @@ void
 SEQUENCE_free(const asn_TYPE_descriptor_t *td, void *sptr,
               enum asn_struct_free_method method) {
     size_t edx;
-    const asn_SEQUENCE_specifics_t *specs =
-        (const asn_SEQUENCE_specifics_t *)td->specifics;
+    const asn_SEQUENCE_specifics_t *specs; 
     asn_struct_ctx_t *ctx; /* Decoder context */
 
 	if(!td || !sptr)
 		return;
 
+    specs = (const asn_SEQUENCE_specifics_t *)td->specifics;
+
 	ASN_DEBUG("Freeing %s as SEQUENCE", td->name);
 
 	for(edx = 0; edx < td->elements_count; edx++) {