A little more modem polishing

ac0defb8 · Steve Underwood · 83965199 · ac0defb8 · ac0defb8 · ac0defb8
--- a/libs/spandsp/src/spandsp/private/t4_rx.h
+++ b/libs/spandsp/src/spandsp/private/t4_rx.h
@@ -105,6 +105,8 @@ struct t4_rx_state_s
    /*! \brief The width of the current page, in pixels. */
    uint32_t image_width;
+    /*! \brief The length of the current page, in pixels. */
+    uint32_t image_length;
    union
    {

--- a/libs/spandsp/src/v27ter_rx.c
+++ b/libs/spandsp/src/v27ter_rx.c
--- a/libs/spandsp/src/v29rx.c
+++ b/libs/spandsp/src/v29rx.c