HP-UX: set alignment pragma in hash table

 we now set pragma pack(4) in htable.c for hpux,
 as we otherwise get this error:

 Program received signal SIGBUS, Bus error
  si_code: 1 - BUS_ADRALN - Invalid address alignment.

src/lib/htable.c

@@ -40,6 +40,12 @@
  * Kern Sibbald, July MMIII
  */
 
+#include "hostconfig.h"
+
+#ifdef HAVE_HPUX_OS
+#pragma pack(4)
+#endif
+
 #include "bareos.h"
 
 #define B_PAGE_SIZE 4096