Fix broken build on OpenBSD

cde/programs/dtcm/dtcm/MonthPanel.c

@@ -59,6 +59,7 @@
  */
 #include <EUSCompat.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <Xm/ManagerP.h>
 #include <Xm/PushBG.h>
 #include <Xm/SeparatoG.h>

cde/programs/dtcm/dtcm/calendarA.c

@@ -54,6 +54,7 @@ static  char sccsid[] = "@(#)calendarA.c 1.196 95/04/12 Copyr 1991 Sun Microsyst
 #include <EUSCompat.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <sys/stat.h>
 #include <sys/param.h> /* MAXPATHLEN defined here */
 #ifdef SVR4

cde/programs/dtcm/dtcm/misc.c

@@ -31,6 +31,7 @@
 #include <EUSCompat.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <ctype.h>

cde/programs/dtcm/dtcm/monthglance.c

@@ -54,6 +54,7 @@ static  char sccsid[] = "@(#)monthglance.c 1.82 95/07/27 Copyr 1994 Sun Microsys
 #include <EUSCompat.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/param.h> /* MAXPATHLEN defined here */

cde/programs/dtcm/dtcm/weekglance.c

@@ -31,6 +31,7 @@
 #include <EUSCompat.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/param.h> /* MAXPATHLEN defined here */

cde/programs/dtcm/libDtCmP/util.c

@@ -54,6 +54,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <pwd.h> 
 #include <netdb.h>