[t:2555] Prevent toku_free(NULL) in regular (not LOADER_USE_PUTS) loader.

If generate_row_for_put sets flags to 0, skey/sval.data are NULL and we unconditionally free them.

git-svn-id: file:///svn/toku/tokudb@19634 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brtloader.c

@@ -877,8 +877,9 @@ static int loader_do_i (BRTLOADER bl,
     
     
     { // clean up this stuff early, to save memory
-	toku_free(skey.data);
-	toku_free(sval.data);
+        //s(key,val).data might be NULL if flags==0 (see above)
+	if (skey.data) toku_free(skey.data);
+	if (sval.data) toku_free(sval.data);
 	toku_free (pkey.data);
 	toku_free (pval.data);
 	skey.data = sval.data = pkey.data = pval.data = NULL; // set to NULL so that the final cleanup won't free them again.