patch 8.1.1392: build failure in tiny version

Problem:    Build failure in tiny version.
Solution:   Define ex_popupclear to ex_ni if not implemented.  Add UNUSED.

src/ex_docmd.c

@@ -397,6 +397,9 @@ static void	ex_folddo(exarg_T *eap);
 #if !defined(FEAT_X11) || !defined(FEAT_XCLIPBOARD)
 # define ex_xrestore		ex_ni
 #endif
+#if !defined(FEAT_TEXT_PROP)
+# define ex_popupclear		ex_ni
+#endif
 
 /*
  * Declare cmdnames[].

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1392,
 /**/
     1391,
 /**/

src/window.c

@@ -1363,7 +1363,7 @@ win_init_some(win_T *newp, win_T *oldp)
 }
 
     static int
-win_valid_popup(win_T *win)
+win_valid_popup(win_T *win UNUSED)
 {
 #ifdef FEAT_TEXT_PROP
     win_T	*wp;