decoder_process: data_structure can be NULL
Check it before dereferencing.
Fixes
@@ -608,7 +608,7 @@ static int decoder_process(const OSSL_PARAM params[], void *arg)
* too special knowledge.
*/
trace_data_structure = data_structure;
- if (data_type != NULL
+ if (data_type != NULL && data_structure != NULL
&& strcasecmp(data_structure, "type-specific") == 0)
data_structure = NULL;
