Fix another Windows build error

lib/zip_source_win32utf8.c

diff --git a/lib/zip_source_win32utf8.c b/lib/zip_source_win32utf8.c
index 59c4eb4..f78eaa1 100644
--- a/lib/zip_source_win32utf8.c
+++ b/lib/zip_source_win32utf8.c
@@ -45,7 +45,7 @@
     if (za == NULL)
 	return NULL;
 
-    return zip_source_win32utf8_create(fname, start, len, &za->error);
+    return zip_source_file_create(fname, start, len, &za->error);
 }