fixed some invalid parameter passing discovered by clang Tokutek/mongo#869

TXNID_NONE is not the same as (TOKUTXN) 0

ft/tests/ftloader-test-bad-generate.cc

@@ -170,7 +170,7 @@ static void test_extractor(int nrows, int nrowsets, bool expect_fail) {
     }
 
     FTLOADER loader;
-    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, "tempXXXXXX", ZERO_LSN, TXNID_NONE, true, 0, false);
+    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, "tempXXXXXX", ZERO_LSN, nullptr, true, 0, false);
     assert(r == 0);
 
     struct rowset *rowset[nrowsets];

ft/tests/ftloader-test-extractor-errors.cc

@@ -180,7 +180,7 @@ static void test_extractor(int nrows, int nrowsets, bool expect_fail, const char
     sprintf(temp, "%s/%s", testdir, "tempXXXXXX");
 
     FTLOADER loader;
-    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, "tempXXXXXX", ZERO_LSN, TXNID_NONE, true, 0, false);
+    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, "tempXXXXXX", ZERO_LSN, nullptr, true, 0, false);
     assert(r == 0);
 
     struct rowset *rowset[nrowsets];

ft/tests/ftloader-test-extractor.cc

@@ -402,7 +402,7 @@ static void test_extractor(int nrows, int nrowsets, const char *testdir) {
     sprintf(temp, "%s/%s", testdir, "tempXXXXXX");
 
     FTLOADER loader;
-    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, temp, ZERO_LSN, TXNID_NONE, true, 0, false);
+    r = toku_ft_loader_open(&loader, NULL, generate, NULL, N, brts, dbs, fnames, compares, temp, ZERO_LSN, nullptr, true, 0, false);
     assert(r == 0);
 
     struct rowset *rowset[nrowsets];

ft/tests/ftloader-test-merge-files-dbufio.cc

@@ -412,7 +412,7 @@ static void test (const char *directory, bool is_error) {
 					       bt_compare_functions,
 					       "tempxxxxxx",
 					       *lsnp,
-                                               TXNID_NONE, true, 0, false);
+                                               nullptr, true, 0, false);
 	assert(r==0);
     }
 

ft/tests/ftloader-test-open.cc

@@ -143,7 +143,7 @@ static void test_loader_open(int ndbs) {
     for (i = 0; ; i++) {
         set_my_malloc_trigger(i+1);
 
-        r = toku_ft_loader_open(&loader, NULL, NULL, NULL, ndbs, brts, dbs, fnames, compares, "", ZERO_LSN, TXNID_NONE, true, 0, false);
+        r = toku_ft_loader_open(&loader, NULL, NULL, NULL, ndbs, brts, dbs, fnames, compares, "", ZERO_LSN, nullptr, true, 0, false);
         if (r == 0)
             break;
     }