Fix utfcpp 4.x build failure (fixes #193)

apertium/adapt_docx.cc

@@ -257,13 +257,13 @@ size_t findBoundary(string _text, size_t begin)
 	size_t length = _text.length();
 	if (begin == 0 || begin >= length)
 		return begin;
-	const unsigned char *text = (unsigned char *) _text.c_str();
-	utf8::iterator<const unsigned char*> textBegin(text, text, text + length);
-	utf8::iterator<const unsigned char*> textEnd(text + length, text, text + length);
-	utf8::iterator<const unsigned char*> it(text + begin, text, text + length);
-	utf8::iterator<const unsigned char*> minBoundary = it;
+	auto text = _text.c_str();
+	utf8::iterator<const char*> textBegin(text, text, text + length);
+	utf8::iterator<const char*> textEnd(text + length, text, text + length);
+	utf8::iterator<const char*> it(text + begin, text, text + length);
+	utf8::iterator<const char*> minBoundary = it;
 	uint32_t cur = *it, cur_1 = 0, cur_2 = 0;
-	utf8::iterator<const unsigned char*> it2 = it;
+	utf8::iterator<const char*> it2 = it;
 	cur_1 = *(--it2);
 	if (it2 != textBegin)
 		cur_2 = *(--it2);
@@ -412,7 +412,7 @@ void process(string fileName, bool outputsName, bool pretty)
 	xmlDocDumpFormatMemory(document, &buffer, &sizeBuffer, pretty ? 1: 0);
 	if (outputsName)
 		cout << "<file name=\"" << fileName << "\"/> ";
-	const unsigned char *p = buffer;
+	const xmlChar *p = buffer;
 	p = printNl2spc(p);
 	if (pretty)
 		cout << p;