* lots of files: handle NULL pointer printf problems,

fix some mem leaks

	* src/gnc-ui-util.c (gnc_account_get_balance_in_currency): new func


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@3983 57a11ea4-9604-0410-9ed3-97b8803252fd

doc-tools/dbadd.c

@@ -65,7 +65,8 @@ static DB *database;
 static void
 usage (const char *name)
 {
-  fprintf (stderr, "Usage: %s database key1 value1 key2 value2 ...\n", name);
+  fprintf (stderr, "Usage: %s database key1 value1 key2 value2 ...\n",
+           name ? name : "");
   exit(1);
 }
 
@@ -87,7 +88,8 @@ main (int argc, char *argv[])
   if (!database)
   {
     fprintf (stderr, "Error opening database %s: %s\n",
-             db_name, strerror (errno));
+             db_name ? db_name : "",
+             strerror (errno) ? strerror (errno) : "");
     exit (1);
   }