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-rw-r--r--gtk2_ardour/processor_box.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/gtk2_ardour/processor_box.cc b/gtk2_ardour/processor_box.cc
index f5a84ba878..26a684770f 100644
--- a/gtk2_ardour/processor_box.cc
+++ b/gtk2_ardour/processor_box.cc
@@ -1291,7 +1291,7 @@ ProcessorEntry::PluginDisplay::on_expose_event (GdkEventExpose* ev)
unsigned char *src = dis->data;
unsigned char *dst = cairo_image_surface_get_data (_surf);
const int dst_stride = cairo_image_surface_get_stride (_surf);
- for(uint32_t y = 0; y < dis->height; ++y) {
+ for (int y = 0; y < dis->height; ++y) {
memcpy (dst, src, dis->width * 4 /*ARGB32*/);
src += dis->stride;
dst += dst_stride;