Fix broken build on OpenBSD

cde/programs/dtfile/FileMgr.c

@@ -105,6 +105,7 @@
 #include <sys/types.h>
 #include <pwd.h>
 #include <string.h>
+#include <stdint.h>
 #include <sys/stat.h>
 #include <ctype.h>
 

cde/programs/dtfile/FileOp.c

@@ -71,6 +71,7 @@
  ************************************<+>*************************************/
 
 #include <string.h>
+#include <stdint.h>
 #include <errno.h>
 #include <sys/time.h>
 #include <sys/types.h>

cde/programs/dtfile/Trash.c

@@ -101,6 +101,7 @@
 #include <dirent.h>
 #include <unistd.h>
 #include <string.h>
+#include <stdint.h>
 #if defined(CSRG_BASED)
 #include <sys/param.h>
 #include <sys/mount.h>