[glib] gstrfuncs: Document that g_ascii_dtostr() writes a nul terminator

[Philip Withnall <pwithnall src gnome org>]

commit 92041f4b3b7eca6ddff0bade48b77d88f906ca6f
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Sun Jan 25 16:22:43 2015 +0000

    gstrfuncs: Document that g_ascii_dtostr() writes a nul terminator
    
    And g_ascii_formatd().
    
    Reviewed-by: Ryan Lortie <desrt desrt ca>

 glib/gstrfuncs.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/glib/gstrfuncs.c b/glib/gstrfuncs.c
index e2b1fb3..9498d81 100644
--- a/glib/gstrfuncs.c
+++ b/glib/gstrfuncs.c
@@ -858,7 +858,8 @@ g_ascii_strtod (const gchar *nptr,
  * the string back using g_ascii_strtod() gives the same machine-number
  * (on machines with IEEE compatible 64bit doubles). It is
  * guaranteed that the size of the resulting string will never
- * be larger than @G_ASCII_DTOSTR_BUF_SIZE bytes.
+ * be larger than @G_ASCII_DTOSTR_BUF_SIZE bytes, including the terminating
+ * nul character, which is always added.
  *
  * Returns: The pointer to the buffer with the converted string.
  **/
@@ -886,6 +887,8 @@ g_ascii_dtostr (gchar       *buffer,
  * a printf()-style format string. Allowed conversion
  * specifiers are 'e', 'E', 'f', 'F', 'g' and 'G'.
  *
+ * The returned buffer is guaranteed to be nul-terminated.
+ *
  * If you just want to want to serialize the value into a
  * string, use g_ascii_dtostr().
  *