progs/demos: Assert that input to malloc is valid.

diff --git a/progs/demos/fire.c b/progs/demos/fire.c
index dd70f6141dba4817452073aeb7a55cbf45fff744..f30b893dbf38d7e1a0964266567899e16a65ad5e 100644 (file)
--- a/progs/demos/fire.c
+++ b/progs/demos/fire.c
@@ -6,6 +6,7 @@
  *            Humanware s.r.l.
  */
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
@@ -759,6 +760,7 @@ main(int ac, char **av)
    glFogfv(GL_FOG_COLOR, fogcolor);
    glFogf(GL_FOG_DENSITY, 0.1);
 
+   assert(np > 0);
    p = (part *) malloc(sizeof(part) * np);
 
    for (i = 0; i < np; i++)