patch 8.1.0732: cannot build without the eval feature

Problem:    Cannot build without the eval feature.
Solution:   Make a copy of the sourced file name.
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 4d48c1b..b3678b1 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -4556,7 +4556,7 @@
 	}
 	si = &SCRIPT_ITEM(current_sctx.sc_sid);
 	si->sn_name = fname_exp;
-	fname_exp = NULL;
+	fname_exp = vim_strsave(si->sn_name);  // used for autocmd
 # ifdef UNIX
 	if (stat_ok)
 	{
@@ -4688,8 +4688,7 @@
 #endif
 
     if (trigger_source_post)
-	apply_autocmds(EVENT_SOURCEPOST, si->sn_name, si->sn_name,
-								FALSE, curbuf);
+	apply_autocmds(EVENT_SOURCEPOST, fname_exp, fname_exp, FALSE, curbuf);
 
 theend:
     vim_free(fname_exp);
diff --git a/src/version.c b/src/version.c
index d7c610b..092077f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -796,6 +796,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    732,
+/**/
     731,
 /**/
     730,