Some unicode funcs belong to Font.cpp + small fix

src/render/Font.cpp

@@ -4,6 +4,32 @@
 #include "TxdStore.h"
 #include "Font.h"
 
+void
+AsciiToUnicode(const char *src, wchar *dst)
+{
+	while((*dst++ = (unsigned char)*src++) != '\0');
+}
+
+void
+UnicodeStrcat(wchar *dst, wchar *append)
+{
+	UnicodeStrcpy(&dst[UnicodeStrlen(dst)], append);
+}
+
+void
+UnicodeStrcpy(wchar *dst, const wchar *src)
+{
+	while((*dst++ = *src++) != '\0');
+}
+
+int
+UnicodeStrlen(const wchar *str)
+{
+	int len;
+	for(len = 0; *str != '\0'; len++, str++);
+	return len;
+}
+
 CFontDetails CFont::Details;
 int16 CFont::NewLine;
 CSprite2d CFont::Sprite[MAX_FONTS];