[PATCH 2/2] control: Minor documentation fixes.

["Tanjeff-N. Moos" <tanjeff@cccmz.de>]

Signed-off-by: Tanjeff-N. Moos <tanjeff@cccmz.de>
---
 include/control.h     | 9 +++++++--
 src/control/cards.c   | 5 ++++-
 src/control/control.c | 2 +-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/include/control.h b/include/control.h
index e1a0da47..40353558 100644
--- a/include/control.h
+++ b/include/control.h
@@ -155,7 +155,7 @@ typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
 /** CTL element info container */
 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
 
-/** CTL element value container
+/** CTL element value container.
  *
  * Contains the value(s) (i.e. members) of a single element. All
  * values of a given element are of the same type.
@@ -167,6 +167,11 @@ typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
  * using the latter, it must be freed again using
  * snd_ctl_elem_value_free().
  *
+ * A value object can be zeroed out using snd_ctl_elem_value_clear().
+ *
+ * A value object can be copied to another one using
+ * snd_ctl_elem_value_copy().
+ *
  * \par Identifier
  *
  * Then, the ID must be filled. It is sufficient to fill only the
@@ -614,7 +619,7 @@ size_t snd_ctl_elem_value_sizeof(void);
  * \brief Allocate an invalid #snd_ctl_elem_value_t on the stack.
  *
  * Allocate space for a value object on the stack. The allocated
- * memory need not be freed, because is on the stack.
+ * memory need not be freed, because it is on the stack.
  *
  * See snd_ctl_elem_value_t for details.
  *
diff --git a/src/control/cards.c b/src/control/cards.c
index 8226c42d..6145ebcd 100644
--- a/src/control/cards.c
+++ b/src/control/cards.c
@@ -147,6 +147,7 @@ int snd_card_get_index(const char *string)
 		return -EINVAL;
 	if ((isdigit(*string) && *(string + 1) == 0) ||
 	    (isdigit(*string) && isdigit(*(string + 1)) && *(string + 2) == 0)) {
+		/* We got an index */
 		if (sscanf(string, "%i", &card) != 1)
 			return -EINVAL;
 		if (card < 0 || card >= SND_MAX_CARDS)
@@ -156,8 +157,10 @@ int snd_card_get_index(const char *string)
 			return card;
 		return err;
 	}
-	if (string[0] == '/')	/* device name */
+	if (string[0] == '/')
+		/* We got a device name */
 		return snd_card_load2(string);
+	/* We got in ID */
 	for (card = 0; card < SND_MAX_CARDS; card++) {
 #ifdef SUPPORT_ALOAD
 		if (! snd_card_load(card))
diff --git a/src/control/control.c b/src/control/control.c
index 7abf8ee3..66eabda5 100644
--- a/src/control/control.c
+++ b/src/control/control.c
@@ -2985,7 +2985,7 @@ size_t snd_ctl_elem_value_sizeof()
 /**
  * \brief Allocate an invalid #snd_ctl_elem_value_t on the heap.
  *
- * Allocate space for a value object on the head. The allocated memory
+ * Allocate space for a value object on the heap. The allocated memory
  * must be freed using snd_ctl_elem_value_free().
  *
  * See snd_ctl_elem_value_t for details.
-- 
2.17.1