patch 8.1.1663: compiler warning for using size_t

Problem:    Compiler warning for using size_t.
Solution:   Add type cast. (Mike Williams)

src/popupwin.c

@@ -199,7 +199,7 @@ set_mousemoved_columns(win_T *wp, int flags)
 	getvcol(textwp, &pos, &mcol, NULL, NULL);
 	wp->w_popup_mouse_mincol = mcol;
 
-	pos.col = col + STRLEN(text) - 1;
+	pos.col = col + (colnr_T)STRLEN(text) - 1;
 	getvcol(textwp, &pos, NULL, NULL, &mcol);
 	wp->w_popup_mouse_maxcol = mcol;
 	vim_free(text);

src/version.c

@@ -777,6 +777,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1663,
 /**/
     1662,
 /**/