patch 8.2.4001: insert complete code uses global variables

Problem:    Insert complete code uses global variables.
Solution:   Make variables local to the file and use accessor functions.
            (Yegappan Lakshmanan, closes #9470)
diff --git a/src/edit.c b/src/edit.c
index 9d359de..4d5ee85 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1280,7 +1280,7 @@
 	    // but it is under other ^X modes
 	    if (*curbuf->b_p_cpt == NUL
 		    && (ctrl_x_mode_normal() || ctrl_x_mode_whole_line())
-		    && !(compl_cont_status & CONT_LOCAL))
+		    && !compl_status_local())
 		goto normalchar;
 
 docomplete:
@@ -1289,7 +1289,7 @@
 	    disable_fold_update++;  // don't redraw folds here
 #endif
 	    if (ins_complete(c, TRUE) == FAIL)
-		compl_cont_status = 0;
+		compl_status_clear();
 #ifdef FEAT_FOLDING
 	    disable_fold_update--;
 #endif