Budget csv exports incorrect, so import crashes

Hello,

I've tested this with the current (4.3) version of homebank compiled under ubuntu (10.04/64bit).

I tried to import a budget from a csv previously exported by homebank. This failed with:

(homebank:18204): GLib-CRITICAL **: g_ascii_strtod: assertion `nptr != NULL' failed
Segmentation fault

To reproduce:
-Create a budget for a subcategory, export to and import from csv.
-Create a monthly budget with values of 0.00 for some month, export to and import from csv.

Searching for the error, I think I found 2 bugs in the Export-to-CSV routines (def_budget.c):

(1) In function "defbudget_save_csv", line 409, the "*" for the budget type (fixed or different each month) does not get written for subcategories. This leads to "2; ;AllTheSame;10" instead of "2;*;AllTheSame;10" in the csv file.

(2) In function "defbudget_getcsvbudgetstr", line 131, the if-statement prevents a budget of 0.00 for a certain month to be added to the csv-string. This leads to "2; ;DifferentEachMonth;5;5;5" instead of "2; ;DifferentEachMonth;5;5;5;0;0;0;0;0;0;0;0;0" in the csv-file.