tFix memmove() invocation with src/dst being NULL - st - [fork] customized build of st, the simple terminal
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       ---
 (DIR) commit 56abffb4b67f235d20de30f29ba027ab34c171e3
 (DIR) parent aff35af275cb82eb876630c9256298ea1d1b2b57
 (HTM) Author: sin <sin@2f30.org>
       Date:   Wed, 15 Apr 2015 09:43:06 +0100
       
       Fix memmove() invocation with src/dst being NULL
       
       This fixes a segmentation fault on some systems.
       
       Diffstat:
         M st.c                                |       7 +++++--
       
       1 file changed, 5 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/st.c b/st.c
       t@@ -2788,8 +2788,11 @@ tresize(int col, int row) {
                        free(term.line[i]);
                        free(term.alt[i]);
                }
       -        memmove(term.line, term.line + i, row * sizeof(Line));
       -        memmove(term.alt, term.alt + i, row * sizeof(Line));
       +        /* ensure that both src and dst are not NULL */
       +        if (i > 0) {
       +                memmove(term.line, term.line + i, row * sizeof(Line));
       +                memmove(term.alt, term.alt + i, row * sizeof(Line));
       +        }
                for(i += row; i < term.row; i++) {
                        free(term.line[i]);
                        free(term.alt[i]);