Fix broken build on OpenBSD

cde/programs/dtwm/Callback.c

@@ -37,6 +37,7 @@
  *
  ****************************************************************************/
 
+#include <stdint.h>
 #include <sys/param.h>
 #include <sys/stat.h>
 

cde/programs/dtwm/DataBaseLoad.c

@@ -57,6 +57,7 @@
 
 #include <pwd.h>
 #include <fcntl.h>
+#include <stdint.h>
 #include <sys/stat.h>
 
 

cde/programs/dtwm/Print.c

@@ -45,6 +45,7 @@
 #include <Dt/Dt.h>
 #include "DataBaseLoad.h"
 #include "Parse.h"
+#include <stdint.h>
 
 #ifdef __STDC__
 const char *szWM_TOOL_CLASS = DtWM_TOOL_CLASS;

cde/programs/dtwm/UI.c

@@ -65,6 +65,7 @@
 #include <X11/keysymdef.h>
 
 #include <langinfo.h>
+#include <stdint.h>
 
 #define MWM_NEED_TIME16
 #include "WmBitmap.h"

cde/programs/dtwm/WmFP.c

@@ -71,6 +71,7 @@
 
 #include <pwd.h>
 #include <fcntl.h>
+#include <stdint.h>
 #include <sys/stat.h>