doc: Avoid \0 in comments.

Doxygen treats \0 as a command, spits out a warning and produces
no output.

diff --git a/string.c b/string.c
index a1f2a43c65756dc6ce066a5b6707c91b94f4c7d4..aa3bcbddabe425cc823e3ad5e567f707f70dbccb 100644 (file)
--- a/string.c
+++ b/string.c
@@ -128,7 +128,8 @@ __must_check __malloc char *para_strdup(const char *s)
  * function calls exit() if insufficient memory is available, while vasprintf()
  * returns -1 in this case.
  *
- * \return Number of bytes written, not including the terminating '\0'.
+ * \return Number of bytes written, not including the terminating \p NULL
+ * character.
  *
  * \sa printf(3), vsnprintf(3), va_start(3), vasprintf(3), \ref xasprintf().
  */