tadd missing header, reduce example packing size - granular - granular dynamics simulation
 (HTM) git clone git://src.adamsgaard.dk/granular
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       ---
 (DIR) commit f845375be0ff38fab566a064266a8507331bb08c
 (DIR) parent 7dd9725c18d77d9d8284980f7d952a58d03f4ca0
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Fri, 19 Mar 2021 22:07:47 +0100
       
       add missing header, reduce example packing size
       
       Diffstat:
         M granularpacking.c                   |       3 ++-
         M packing.c                           |       1 +
       
       2 files changed, 3 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/granularpacking.c b/granularpacking.c
       t@@ -1,4 +1,5 @@
        #include <stdio.h>
       +#include <stdlib.h>
        #include "packing.h"
        #include "simulation.h"
        #include "arrays.h"
       t@@ -10,7 +11,7 @@ main(void)
                struct simulation sim;
        
                size_t n[3], np = 0;
       -        n[0] = 50; n[1] = 50; n[2] = 50;
       +        n[0] = 10; n[1] = 5; n[2] = 1;
                double *origo = zeros(3);
                
                /* np = rectangular_packing(&sim.grains, n, 1.0, 1.0, random_value_uniform, 0.0, &origo); */
 (DIR) diff --git a/packing.c b/packing.c
       t@@ -1,4 +1,5 @@
        #include <stdio.h>
       +#include <stdlib.h>
        #include <err.h>
        #include <math.h>
        #include "util.h"