av_extend() doc tweak from Jan Dubois

p4raw-id: //depot/perl@2867

diff --git a/pod/perlguts.pod b/pod/perlguts.pod
index 551e84c..0b9eed0 100644 (file)
--- a/pod/perlguts.pod
+++ b/pod/perlguts.pod
@@ -263,9 +263,9 @@ return value.
 The C<av_clear> function deletes all the elements in the AV* array, but
 does not actually delete the array itself.  The C<av_undef> function will
 delete all the elements in the array plus the array itself.  The
-C<av_extend> function extends the array so that it contains C<key>
-elements.  If C<key> is less than the current length of the array, then
-nothing is done.
+C<av_extend> function extends the array so that it contains at least C<key+1>
+elements.  If C<key+1> is less than the currently allocated length of the array,
+then nothing is done.
 
 If you know the name of an array variable, you can get a pointer to its AV
 by using the following: