[gtk/layout-manager-transform-demo] win32 build fix

[Matthias Clasen <matthiasc src gnome org>]

commit f63d64d7b25a8e09d52c054d3f310487f59fb6a2
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 1 23:28:57 2020 -0400

    win32 build fix

 demos/gtk-demo/singular_value_decomposition.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/singular_value_decomposition.c b/demos/gtk-demo/singular_value_decomposition.c
index d50bb80ace..05d04d0667 100644
--- a/demos/gtk-demo/singular_value_decomposition.c
+++ b/demos/gtk-demo/singular_value_decomposition.c
@@ -1,7 +1,7 @@
 #include <string.h>
 #include <float.h>
 #include <math.h>
-#include <alloca.h>
+#include <glib.h>
 
 /* See Golub and Reinsch,
  * "Handbook for Automatic Computation vol II - Linear Algebra",
@@ -349,7 +349,7 @@ singular_value_decomposition (double *A,
 {
   double *superdiagonal;
 
-  superdiagonal = alloca (sizeof (double) * ncols);
+  superdiagonal = g_alloca (sizeof (double) * ncols);
 
   if (nrows < ncols)
     return -1;