patch 8.0.0992: terminal title is wrong when 'encoding' is DBCS

Problem:    Terminal title is wrong when 'encoding' is DBCS.
Solution:   Convert the title from DBCS to utf-8. (Yasuhiro Matsumoto, closes
            #2009)

Author: brammool

src/terminal.c

@@ -1837,6 +1837,24 @@ handle_settermprop(
 	     * displayed */
 	    if (*skipwhite((char_u *)value->string) == NUL)
 		term->tl_title = NULL;
+#ifdef WIN3264
+	    else if (!enc_utf8 && enc_codepage > 0)
+	    {
+		WCHAR   *ret = NULL;
+		int	length = 0;
+
+		MultiByteToWideChar_alloc(CP_UTF8, 0,
+			(char*)value->string, STRLEN(value->string),
+								&ret, &length);
+		if (ret != NULL)
+		{
+		    WideCharToMultiByte_alloc(enc_codepage, 0,
+					ret, length, (char**)&term->tl_title,
+					&length, 0, 0);
+		    vim_free(ret);
+		}
+	    }
+#endif
 	    else
 		term->tl_title = vim_strsave((char_u *)value->string);
 	    vim_free(term->tl_status_text);

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    992,
 /**/
     991,
 /**/