gnu: ledger: Fix test failures.

* gnu/packages/patches/ledger-revert-boost-python-fix.patch,
gnu/packages/patches/ledger-fix-uninitialized.patch: New patches.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/finance.scm (ledger)[source]: Use them.

gnu/packages/patches/ledger-fix-uninitialized.patch

@@ -0,0 +1,27 @@
+This fixes failures of tests "BaseLine_opt-datetime-format" and
+"BaseLine_opt-time-report", which were printing an unexpected trailing '*' on
+the last line of output, e.g.:
+
+  @@ -5,4 +5,4 @@
+     04/05/13 12:00 PM    04/05/13 01:30 PM       1.50h    Lunch
+     04/05/13 11:30 AM    04/05/13 12:00 PM       30.0m    Walk
+   --------------------------------------------------
+  -                                           
+  +                                          *
+
+Reported upstream at
+https://groups.google.com/d/msg/ledger-cli/EeJUrUk8YDc/pIR-LOTVEAAJ
+
+diff --git a/src/account.h b/src/account.h
+index 1b97463d..f2555593 100644
+--- a/src/account.h
++++ b/src/account.h
+@@ -187,7 +187,7 @@ public:
+ 
+       datetime_t         earliest_checkin;
+       datetime_t         latest_checkout;
+-      bool               latest_checkout_cleared;
++      bool               latest_checkout_cleared = false;
+ 
+       std::set<path>     filenames;
+       std::set<string>   accounts_referenced;