[gnumeric] long double: fix some debug printouts.

[Morten Welinder <mortenw src gnome org>]

commit 4adc9772f95fda44f01d2de309d5f82fcfebad2e
Author: Morten Welinder <terra gnome org>
Date:   Thu Feb 3 18:14:24 2022 -0500

    long double: fix some debug printouts.

 plugins/nlsolve/gnm-nlsolve.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/plugins/nlsolve/gnm-nlsolve.c b/plugins/nlsolve/gnm-nlsolve.c
index 623936e02..38f042332 100644
--- a/plugins/nlsolve/gnm-nlsolve.c
+++ b/plugins/nlsolve/gnm-nlsolve.c
@@ -242,14 +242,14 @@ newton_improve (GnmNlsolve *nl, gnm_float *xs)
                        ok = TRUE;
                } else {
                        if (nl->debug)
-                               g_printerr ("Full newton step would go to %g\n", y2);
+                               g_printerr ("Full newton step would go to %" GNM_FORMAT_g "\n", y2);
 
                        f = gnm_solver_line_search
                                (sol, xs, d, FALSE, 0.75, 1, 0.01, &y2);
 
                        if (f > 0 && f < 1 && y2 < isol->yk) {
                                if (nl->debug)
-                                       g_printerr ("Accepting reduced newton step with f=%g\n", f);
+                                       g_printerr ("Accepting reduced newton step with f=%" GNM_FORMAT_g 
"\n", f);
                                for (i = 0; i < n; i++)
                                        isol->xk[i] = xs[i] + f * d[i];
                                isol->yk = y2;
@@ -453,7 +453,9 @@ rosenbrock_iter (GnmNlsolve *nl)
                        for (i = 0; i < n; i++) {
                                nl->xi[0][i] = A[0][i] / div;
                                if (!gnm_finite (nl->xi[0][i])) {
-                                       g_printerr ("%g %g %g\n",
+                                       g_printerr ("%" GNM_FORMAT_g
+                                                   " %" GNM_FORMAT_g
+                                                   " %" GNM_FORMAT_g "\n",
                                                    div, A[0][i], nl->xi[0][i]);
                                        g_assert (gnm_finite (nl->xi[0][i]));
                                }