diff -r f9344e30a3b9 -r 4124c37fd953 librazor/transaction.c
--- a/librazor/transaction.c	Thu Jun 26 09:21:14 2008 -0400
+++ b/librazor/transaction.c	Sun Jun 29 17:32:19 2008 +0100
@@ -32,6 +32,7 @@
 #include <errno.h>
 #include <ctype.h>
 #include <fnmatch.h>
+#include <assert.h>
 
 #include "razor-internal.h"
 #include "razor.h"
@@ -188,6 +189,9 @@
 razor_transaction_install_package(struct razor_transaction *trans,
 				  struct razor_package *package)
 {
+	assert (trans != NULL);
+	assert (package != NULL);
+
 	transaction_set_install_package(&trans->upstream, package);
 	trans->changes++;
 }
@@ -196,6 +200,9 @@
 razor_transaction_remove_package(struct razor_transaction *trans,
 				 struct razor_package *package)
 {
+	assert (trans != NULL);
+	assert (package != NULL);
+
 	transaction_set_remove_package(&trans->system, package);
 	trans->changes++;
 }
@@ -206,6 +213,9 @@
 {
 	struct razor_package *spkgs, *upkgs, *end;
 
+	assert (trans != NULL);
+	assert (package != NULL);
+
 	spkgs = trans->system.set->packages.data;
 	upkgs = trans->upstream.set->packages.data;
 	end = trans->system.set->packages.data +
@@ -532,6 +542,8 @@
 	struct razor_package *p;
 	int i, count;
 
+	assert (trans != NULL);
+
 	count = trans->system.set->packages.size / sizeof *p;
 	for (i = 0; i < count; i++)
 		trans->system.packages[i] |= TRANS_PACKAGE_UPDATE;
@@ -868,6 +880,8 @@
 RAZOR_EXPORT void
 razor_transaction_destroy(struct razor_transaction *trans)
 {
+	assert (trans != NULL);
+
 	transaction_set_release(&trans->system);
 	transaction_set_release(&trans->upstream);
 	free(trans);