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app: Fix potential segfault caused by accessing empty history buffer

This commit is contained in:
Alexia Death 2010-09-09 21:56:19 +03:00
parent 113941a7e5
commit d9932ff159
1 changed files with 5 additions and 2 deletions
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7
app/display/gimpdisplayshell-coords.c
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@ -163,7 +163,9 @@ gimp_display_shell_eval_event (GimpDisplayShell *shell,
coords->velocity = MIN (coords->velocity, 1.0);
}
if ((fabs (delta_x) > DIRECTION_RADIUS) && (fabs (delta_y) > DIRECTION_RADIUS))
if (((fabs (delta_x) > DIRECTION_RADIUS) &&
(fabs (delta_y) > DIRECTION_RADIUS)) ||
(shell->event_history->len < 4))
{
dir_delta_x = delta_x;
dir_delta_y = delta_y;
@ -173,7 +175,8 @@ gimp_display_shell_eval_event (GimpDisplayShell *shell,
gint x = 3;
while (((fabs (dir_delta_x) < DIRECTION_RADIUS) ||
(fabs (dir_delta_y) < DIRECTION_RADIUS)) && (x >= 0))
(fabs (dir_delta_y) < DIRECTION_RADIUS)) &&
(x >= 0))
{
const GimpCoords old_event = g_array_index (shell->event_history,
GimpCoords, x);