diff -up kdelibs-4.14.38/kimgio/jp2.cpp.me kdelibs-4.14.38/kimgio/jp2.cpp
--- kdelibs-4.14.38/kimgio/jp2.cpp.me	2020-08-27 17:41:44.809195175 +0200
+++ kdelibs-4.14.38/kimgio/jp2.cpp	2020-08-27 17:55:29.534742787 +0200
@@ -103,13 +103,13 @@ static void jas_stream_initbuf(jas_strea
         stream->bufmode_ |= bufmode & JAS_STREAM_BUFMODEMASK;
 }
 
-static int qiodevice_read(jas_stream_obj_t *obj, char *buf, int cnt)
+static int qiodevice_read(jas_stream_obj_t *obj, char *buf, unsigned int cnt)
 {
         QIODevice *io = (QIODevice*) obj;
         return io->read(buf, cnt);
 }
 
-static int qiodevice_write(jas_stream_obj_t *obj, char *buf, int cnt)
+static int qiodevice_write(jas_stream_obj_t *obj, char *buf, unsigned int cnt)
 {
         QIODevice *io = (QIODevice*) obj;
         return io->write(buf, cnt);