Fix broken build on OpenBSD

cde/lib/DtSvc/DtUtil1/ActionDb.c

@@ -43,6 +43,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <ctype.h>
+#include <stdint.h>
 #include <string.h>
 #include <X11/Intrinsic.h>
 

cde/lib/DtSvc/DtUtil1/DtHash.c

@@ -94,6 +94,7 @@ Author:  Bart Smaalders 1/89
 #include "DtHash.h"
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
 #include <unistd.h>
 
 static int hash_string(const unsigned char * s, int modulo);

cde/lib/DtSvc/DtUtil1/Dts.c

@@ -48,6 +48,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <ctype.h>
 #include <sys/mman.h>
 #include <stdio.h>

cde/lib/DtSvc/DtUtil1/MMDb.c

@@ -37,6 +37,7 @@
 
 #include <ctype.h>
 #include <string.h>
+#include <stdint.h>
 
 #ifdef NLS16
 #include <limits.h>