patch 8.1.0364: compiler warning in xdiff code

Problem:    Compiler warning in xdiff code. (Yegappan Lakshmanan)
Solution:   Initialize directly.
diff --git a/src/version.c b/src/version.c
index 853c86f..0654c29 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    364,
+/**/
     363,
 /**/
     362,
diff --git a/src/xdiff/README.txt b/src/xdiff/README.txt
index f77893d..1afe740 100644
--- a/src/xdiff/README.txt
+++ b/src/xdiff/README.txt
@@ -11,4 +11,6 @@
 The code is distributed under the GNU LGPL license.  It is included in the
 COPYING file.
 
+Changes in these files were made to avoid compiler warnings.
+
 The first work for including xdiff in Vim was done by Christian Brabandt.
diff --git a/src/xdiff/xemit.c b/src/xdiff/xemit.c
index 718b3ae..dfc1d51 100644
--- a/src/xdiff/xemit.c
+++ b/src/xdiff/xemit.c
@@ -169,7 +169,9 @@
 	long s1, s2, e1, e2, lctx;
 	xdchange_t *xch, *xche;
 	long funclineprev = -1;
-	struct func_line func_line = { 0 };
+	struct func_line func_line;
+
+	func_line.len = 0;
 
 	for (xch = xscr; xch; xch = xche->next) {
 		xche = xdl_get_hunk(&xch, xecfg);