imlib2_conv.c: Fix gcc8 warning

imlib2_conv.c: In function ‘main’:
imlib2_conv.c:64:14: error: ‘strncpy’ specified bound depends on the length of the source argument [-Werror=stringop-overflow=]
              strncpy(p, dot, (strlen(dot) < 9) ? strlen(dot) : 8);
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
imlib2_conv.c:64:31: note: length computed here
              strncpy(p, dot, (strlen(dot) < 9) ? strlen(dot) : 8);
                               ^~~~~~~~~~~

1 files changed, 2 insertions, 4 deletions

diff --git a/src/bin/imlib2_conv.c b/src/bin/imlib2_conv.c
index 975a4e0..0148079 100644
--- a/src/bin/imlib2_conv.c
+++ b/src/bin/imlib2_conv.c
@@ -59,11 +59,9 @@ main(int argc, char **argv)
              char               *p, *q;
 
              /* max length of 8 for format name. seems reasonable. */
-             q = p = malloc(9);
-             memset(p, 0, 8);
-             strncpy(p, dot, (strlen(dot) < 9) ? strlen(dot) : 8);
+             p = strndup(dot, 8);
              /* Imlib2 only recognizes lowercase formats. convert it. */
-             for (q[8] = 0; *q; q++)
+             for (q = p; *q; q++)
                 *q = tolower(*q);
              imlib_image_set_format(p);
              free(p);