set selection to IDLE on clear

Otherwise a tangling bmotion event will consider
the selection still valid and selnormalize segfaults
because of an invalid sel.ob.y index.

1 files changed, 1 insertions, 0 deletions

diff --git a/st.c b/st.c
index 73fe291..c0a9bf3 100644
--- a/st.c
+++ b/st.c
@@ -1069,6 +1069,7 @@ void
 selclear(XEvent *e) {
         if(sel.ob.x == -1)
                 return;
+        sel.mode = SEL_IDLE;
         sel.ob.x = -1;
         tsetdirt(sel.nb.y, sel.ne.y);
 }