patch 8.2.2938: after using motion force from feedkeys() it sticks

Problem:    After using motion force from feedkeys() it may not be reset.
Solution:   Clear motion_force in clearop(). (closes #8323)
diff --git a/src/normal.c b/src/normal.c
index c4c1679..fe47e2b 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -1750,6 +1750,7 @@
     oap->regname = 0;
     oap->motion_force = NUL;
     oap->use_reg_one = FALSE;
+    motion_force = NUL;
 }
 
     void