patch 8.1.0781: build error when using if_xcmdsrv.c

Problem:    Build error when using if_xcmdsrv.c.
Solution:   Add missing part of 8.1.0779.
diff --git a/src/if_xcmdsrv.c b/src/if_xcmdsrv.c
index 635e710..3439f9d 100644
--- a/src/if_xcmdsrv.c
+++ b/src/if_xcmdsrv.c
@@ -228,7 +228,7 @@
 	{
 	    if (res < -1 || i >= 1000)
 	    {
-		MSG_ATTR(_("Unable to register a command server name"),
+		msg_attr(_("Unable to register a command server name"),
 							      HL_ATTR(HLF_W));
 		return FAIL;
 	    }
diff --git a/src/version.c b/src/version.c
index 946a6a2..b62aa35 100644
--- a/src/version.c
+++ b/src/version.c
@@ -792,6 +792,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    781,
+/**/
     780,
 /**/
     779,