Patch for portability of latin characters in C files

Coming from LibreOffice repository:
http://cgit.freedesktop.org/libreoffice/core/plain/libxml2/libxml2-latin.patch
diff --git a/runtest.c b/runtest.c
index 4953889..c6517a3 100644
--- a/runtest.c
+++ b/runtest.c
@@ -2724,7 +2724,7 @@
     "file:///path/to/a%20b.html",
     "/path/to/a b.html",
     "/path/to/a%20b.html",
-    "urip://example.com/résumé.html",
+    "urip://example.com/r" "\xe9" "sum" "\xe9" ".html",
     "urip://example.com/test?a=1&b=2%263&c=4#foo",
     NULL
 };
diff --git a/testapi.c b/testapi.c
index 8bc6483..ba68e2e 100644
--- a/testapi.c
+++ b/testapi.c
@@ -287,7 +287,7 @@
 static xmlChar gen_xmlChar(int no, int nr ATTRIBUTE_UNUSED) {
     if (no == 0) return('a');
     if (no == 1) return(' ');
-    if (no == 2) return((xmlChar) 'ø');
+    if (no == 2) return((xmlChar) '\xf8');
     return(0);
 }
 
@@ -395,7 +395,7 @@
 static xmlChar *gen_const_xmlChar_ptr(int no, int nr ATTRIBUTE_UNUSED) {
     if (no == 0) return((xmlChar *) "foo");
     if (no == 1) return((xmlChar *) "<foo/>");
-    if (no == 2) return((xmlChar *) "nøne");
+    if (no == 2) return((xmlChar *) "n" "\xf8" "ne");
     if (no == 3) return((xmlChar *) " 2ab ");
     return(NULL);
 }