updated for version 7.3.1201

Problem:    When a startup script creates a preview window, it probably
            becomes the current window.
Solution:   Make another window the current one. (Christian Brabandt)

src/main.c

@@ -2816,7 +2816,25 @@ edit_buffers(parmp)
 # ifdef FEAT_AUTOCMD
     --autocmd_no_enter;
 # endif
-    win_enter(firstwin, FALSE);		/* back to first window */
+#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
+    /*
+     * Avoid making a preview window the current window.
+     */
+    if (firstwin->w_p_pvw)
+    {
+       win_T   *win;
+
+       for (win = firstwin; win != NULL; win = win->w_next)
+           if (!win->w_p_pvw)
+           {
+               firstwin = win;
+               break;
+           }
+    }
+#endif
+    /* make the first window the current window */
+    win_enter(firstwin, FALSE);
+
 # ifdef FEAT_AUTOCMD
     --autocmd_no_leave;
 # endif