[hackers] [st] Fix copy of line with len = 0 || Roberto E. Vargas Caballero

[git]

commit 5d2d9d540d84761cf11648ea42a6413001a5d7b9
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Thu Sep 10 11:53:11 2015 +0200
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Thu Sep 10 11:53:11 2015 +0200

    Fix copy of line with len = 0
    
    When a line has no any character linelen is 0, so last = 
&term.line[y][MIN(lastx, linelen-1)]
    generated a pointer to the end of the previous line. The best thing we can 
do in this case
    is to add a newline, because we don't have a glyph to print (and consult 
its state of
    wrapping).

diff --git a/st.c b/st.c
index 530d7e4..bd8b815 100644
--- a/st.c
+++ b/st.c
@@ -1004,7 +1004,10 @@ getsel(void)
 
        /* append every set & selected glyph to the selection */
        for (y = sel.nb.y; y <= sel.ne.y; y++) {
-               linelen = tlinelen(y);
+               if ((linelen = tlinelen(y)) == 0) {
+                       *ptr++ = '\n';
+                       continue;
+               }
 
                if (sel.type == SEL_RECTANGULAR) {
                        gp = &term.line[y][sel.nb.x];