This is a fixup for b2db18cda2e4e7951655cb2a34108a8523b6eca9 audioconvert: avoid float calculations when mixing integer-formatted channels The int matrix was using gint and gint32 synonymously, which can theoretically cause problems if gint and gint32 are actually different types. https://bugzilla.gnome.org/show_bug.cgi?id=747005