patch 8.2.4015: build failure with tiny features

Problem:    Build failure with tiny features. (Tony Mechelynck)
Solution:   Adjust #ifdefs.
diff --git a/src/errors.h b/src/errors.h
index 3b765a1..2d164cd 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -2318,8 +2318,10 @@
 	INIT(= N_("E990: Missing end marker '%s'"));
 EXTERN char e_cannot_use_heredoc_here[]
 	INIT(= N_("E991: cannot use =<< here"));
+#endif
 EXTERN char e_not_allowed_in_modeline_when_modelineexpr_is_off[]
 	INIT(= N_("E992: Not allowed in a modeline when 'modelineexpr' is off"));
+#ifdef FEAT_EVAL
 EXTERN char e_window_nr_is_not_popup_window[]
 	INIT(= N_("E993: window %d is not a popup window"));
 EXTERN char e_not_allowed_in_popup_window[]
diff --git a/src/version.c b/src/version.c
index dcebe58..d331c87 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4015,
+/**/
     4014,
 /**/
     4013,