Update Android port

* doc/emacs/input.texi (On-Screen Keyboards): Document changes
to text conversion.
* java/org/gnu/emacs/EmacsInputConnection.java (getExtractedText)
(EmacsInputConnection):
* src/keyboard.c (read_key_sequence): Disable text conversion
after reading prefix key.
* src/textconv.c (get_extracted_text): Fix returned value when
request length is zero.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/textconv.c b/src/textconv.c
index 1ca5f0488f8..4b5f9e01162 100644
--- a/src/textconv.c
+++ b/src/textconv.c
@@ -1462,6 +1462,9 @@ get_extracted_text (struct frame *f, ptrdiff_t n,
   /* Figure out the bounds of the text to return.  */
   if (n != -1)
     {
+      /* Make sure n is at least 2.  */
+      n = max (2, n);
+
       start = PT - n / 2;
       end = PT + n - n / 2;
     }