[hackers] [st] STREscape: don't trim prematurely || Avi Halachmi (:avih)

[git]

commit 7ceb3d1f72eabfa678e5cfae176c57630ad98c43
Author:     Avi Halachmi (:avih) <avih...@yahoo.com>
AuthorDate: Wed Oct 16 12:19:49 2019 +0300
Commit:     Hiltjo Posthuma <hil...@codemadness.org>
CommitDate: Sun Nov 10 22:45:54 2019 +0100

    STREscape: don't trim prematurely
    
    STRescape holds strings in escape sequences such as OSC and DCS, and
    its buffer is 512 bytes.
    
    If the input is too big then trailing chars are ignored, but the test
    was off-by-1 such that it took 510 chars instead of 511 (before a
    terminating NULL is added).
    
    Now the full size can be utilized.

diff --git a/st.c b/st.c
index a8f8232..50226d1 100644
--- a/st.c
+++ b/st.c
@@ -2330,7 +2330,7 @@ tputc(Rune u)
                if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q')
                        term.mode |= MODE_SIXEL;
 
-               if (strescseq.len+len >= sizeof(strescseq.buf)-1) {
+               if (strescseq.len+len >= sizeof(strescseq.buf)) {
                        /*
                         * Here is a bug in terminals. If the user never sends
                         * some code to stop the str or esc command, then st