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.

Author: brammool

src/if_xcmdsrv.c

@@ -228,7 +228,7 @@ serverRegisterName(
 	{
 	    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;
 	    }

src/version.c

@@ -791,6 +791,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    781,
 /**/
     780,
 /**/