updated for version 7.3.1278

Problem:    When someone sets the screen size to a huge value with "stty" Vim
            runs out of memory before reducing the size.
Solution:   Limit Rows and Columns in more places.

src/os_unix.c

@@ -3777,6 +3777,7 @@ mch_get_shellsize()
 
     Rows = rows;
     Columns = columns;
+    limit_screen_size();
     return OK;
 }