patch 8.2.4241: some type casts are redundant

Problem:    Some type casts are redundant.
Solution:   Remove the type casts. (closes #9643)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index fa06e06..aa91539 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -6800,7 +6800,7 @@
 	    n += wp->w_width;
 	else if (n == 0 && eap->arg[0] == NUL)	// default is very wide
 	    n = 9999;
-	win_setwidth_win((int)n, wp);
+	win_setwidth_win(n, wp);
     }
     else
     {
@@ -6808,7 +6808,7 @@
 	    n += wp->w_height;
 	else if (n == 0 && eap->arg[0] == NUL)	// default is very high
 	    n = 9999;
-	win_setheight_win((int)n, wp);
+	win_setheight_win(n, wp);
     }
 }
 
@@ -7531,7 +7531,7 @@
     {
 	n = W_WINROW(curwin) + curwin->w_wrow - msg_scrolled;
 	if (n >= 0)
-	    windgoto((int)n, curwin->w_wincol + curwin->w_wcol);
+	    windgoto(n, curwin->w_wincol + curwin->w_wcol);
     }
 
     len = eap->line2;