patch 9.0.0069: leaking memory when using text prop with inserted text

Problem:    Leaking memory when using text prop with inserted text.
Solution:   Clear the growarray with text.

src/buffer.c

@@ -1003,6 +1003,9 @@ free_buffer_stuff(
 #endif
 #ifdef FEAT_NETBEANS_INTG
     netbeans_file_killed(buf);
+#endif
+#ifdef FEAT_PROP_POPUP
+    ga_clear_strings(&buf->b_textprop_text);
 #endif
     map_clear_mode(buf, MAP_ALL_MODES, TRUE, FALSE);  // clear local mappings
     map_clear_mode(buf, MAP_ALL_MODES, TRUE, TRUE);   // clear local abbrevs

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    69,
 /**/
     68,
 /**/