Correct documented return value for BIO_get_mem_data()
CLA: trivial
@@ -122,9 +122,12 @@ There should be an option to set the maximum size of a memory BIO.
BIO_s_mem() and BIO_s_secmem() return a valid memory B<BIO_METHOD> structure.
-BIO_set_mem_eof_return(), BIO_get_mem_data(), BIO_set_mem_buf() and BIO_get_mem_ptr()
+BIO_set_mem_eof_return(), BIO_set_mem_buf() and BIO_get_mem_ptr()
return 1 on success or a value which is less than or equal to 0 if an error occurred.
+BIO_get_mem_data() returns the total number of bytes available on success,
+0 if b is NULL, or a negative value in case of other errors.
+
BIO_new_mem_buf() returns a valid B<BIO> structure on success or NULL on error.
=head1 EXAMPLES
