include sys/types.h for u_int32_t

ui.c:340:5: error: unknown type name 'u_int32_t'; did you mean 'uint32_t'?
     u_int32_t     addr;
     ^~~~~~~~~
Index: OpenIPMI-2.0.22/ui/ui.c
===================================================================
--- OpenIPMI-2.0.22.orig/ui/ui.c
+++ OpenIPMI-2.0.22/ui/ui.c
@@ -42,6 +42,7 @@
 #include <fcntl.h>
 #include <time.h>
 #include <sys/time.h>
+#include <sys/types.h>
 #include <ctype.h>
 
 #include <OpenIPMI/selector.h>