fix HPUX bustage - now that we're using PR_FREEIF, you can't put (void*)

casts inside it.

modules/libpref/src/prefapi.c

@@ -140,7 +140,7 @@ pref_FreeEntry(void *pool, PRHashEntry *he, uint flag)
 	}
 
     if (flag == HT_FREE_ENTRY) {
-		PR_FREEIF((void *)he->key);
+		PR_FREEIF(he->key);
         PR_Free(he);
 	}
 }

modules/libpref/src/prefapi.cpp

@@ -140,7 +140,7 @@ pref_FreeEntry(void *pool, PRHashEntry *he, uint flag)
 	}
 
     if (flag == HT_FREE_ENTRY) {
-		PR_FREEIF((void *)he->key);
+		PR_FREEIF(he->key);
         PR_Free(he);
 	}
 }