patch 8.1.0648: custom operators can't act upon a forced motion

Problem:    Custom operators can't act upon a forced motion. (Christian
            Wellenbrock)
Solution:   Add the forced motion to the mode() result. (Christian Brabandt,
            closes #3490)
diff --git a/src/globals.h b/src/globals.h
index 71400ca..eaced2a 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -928,6 +928,7 @@
  * "Visual_mode"    When State is NORMAL or INSERT.
  * "finish_op"	    When State is NORMAL, after typing the operator and before
  *		    typing the motion command.
+ * "motion_force"   Last motion_force  from do_pending_operator()
  * "debug_mode"	    Debug mode.
  */
 EXTERN int	State INIT(= NORMAL);	/* This is the current state of the
@@ -938,6 +939,7 @@
 
 EXTERN int	finish_op INIT(= FALSE);/* TRUE while an operator is pending */
 EXTERN long	opcount INIT(= 0);	/* count for pending operator */
+EXTERN int	motion_force INIT(= 0); // motion force for pending operator
 
 /*
  * Ex mode (Q) state