dtscreen: include stdlib where appropriate

Signed-off-by: Robert Tomsick <robert@tomsick.net>

cde/programs/dtscreen/flame.c

@@ -44,6 +44,7 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
 
 #define MAXTOTAL	10000
 #define MAXBATCH	10

cde/programs/dtscreen/hopalong.c

@@ -52,6 +52,7 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
 
 typedef struct {
     int         centerx;

cde/programs/dtscreen/image.c

@@ -42,6 +42,7 @@
 
 #include "dtscreen.h"
 #include "xlogo.bit"
+#include <stdlib.h>
 
 static XImage logo = {
     0, 0,			/* width, height */

cde/programs/dtscreen/life.c

@@ -47,6 +47,7 @@
 
 #include "dtscreen.h"
 #include "lifeicon.bit"
+#include <stdlib.h>
 
 static XImage logo = {
     0, 0,			/* width, height */

cde/programs/dtscreen/pyro.c

@@ -50,6 +50,8 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
+
 #define TWOPI 6.2831853
 
 /* Define this >1 to get small rectangles instead of points */

cde/programs/dtscreen/qix.c

@@ -49,6 +49,7 @@
  */
 
 #include "dtscreen.h"
+#include <stdlib.h>
 
 typedef struct {
     int         x;

cde/programs/dtscreen/rotor.c

@@ -47,6 +47,7 @@
 
 #include <stdio.h>
 #include <math.h>
+#include <stdlib.h>
 #include "dtscreen.h"
 
 #define SAVE 		100	/* this is a good constant to tweak */

cde/programs/dtscreen/swarm.c

@@ -38,6 +38,7 @@
  * 31-Aug-90: Adapted from xswarm by Jeff Butterworth. (butterwo@ncsc.org)
  */
 
+#include <stdlib.h>
 #include "dtscreen.h"
 
 #define TIMES	4		/* number of time positions recorded */

cde/programs/dtscreen/worm.c

@@ -54,6 +54,7 @@
 
 #include "dtscreen.h"
 #include <math.h>
+#include <stdlib.h>
 
 #define MAXCOLORS 64
 #define MAXWORMS 64