restore lost initialization of choice_answer

looks like we lost it in

"changeset 2768:e7f98f931ed7
 Modified a_Dialog_choice5() to accept any number of alternatives [p37sitdu]"

1 files changed, 2 insertions, 0 deletions

diff --git a/src/dialog.cc b/src/dialog.cc
index 03949a1c..64f60e38 100644
--- a/src/dialog.cc
+++ b/src/dialog.cc
@@ -382,6 +382,8 @@ int a_Dialog_choice(const char *title, const char *msg, ...)
     va_end(ap);
    window->end();
 
+   choice_answer = 0;
+
    window->show();
    while (window->shown())
       Fl::wait();