korad-kaxxxxp: address style nits, redundant data type in malloc

Rephrase malloc calls, eliminate a redundant yet unnecessary data type
duplication. Just get how much space the variable happens to require.

Author: gsigh

src/hardware/korad-kaxxxxp/api.c

@@ -310,7 +310,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	sr_dbg("Found: %s %s (idx %zu).", model->vendor, model->name,
 		model - &models[0]);
 
-	sdi = g_malloc0(sizeof(struct sr_dev_inst));
+	sdi = g_malloc0(sizeof(*sdi));
 	sdi->status = SR_ST_INACTIVE;
 	sdi->vendor = g_strdup(model->vendor);
 	sdi->model = g_strdup(model->name);
@@ -323,7 +323,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "V");
 	sr_channel_new(sdi, 1, SR_CHANNEL_ANALOG, TRUE, "I");
 
-	devc = g_malloc0(sizeof(struct dev_context));
+	devc = g_malloc0(sizeof(*devc));
 	sr_sw_limits_init(&devc->limits);
 	g_mutex_init(&devc->rw_mutex);
 	devc->model = model;