variant: return NULL on allocation exception (CID 507556)

Signed-off-by: Eduardo Silva <[email protected]>

src/cfl_variant.c

@@ -104,7 +104,7 @@ struct cfl_variant *cfl_variant_create_from_string_s(char *value, size_t value_s
         instance->data.as_string = cfl_sds_create_len(value, value_size);
         if (instance->data.as_string == NULL) {
             free(instance);
-            instance = NULL;
+            return NULL;
         }
 
     }