Fixed memory leak in emubd's out-of-order write emulation

We need to decrement the saved block state on sync, when we reset
out-of-order emulation. Otherwise we leak blocks out the wazoo.

bd/lfs_emubd.c

diff --git a/bd/lfs_emubd.c b/bd/lfs_emubd.c
index 3f6183c..a734bc2 100644
--- a/bd/lfs_emubd.c
+++ b/bd/lfs_emubd.c
@@ -531,6 +531,7 @@
     // emulate out-of-order writes? reset first write, writes
     // cannot be out-of-order across sync
     if (bd->cfg->powerloss_behavior == LFS_EMUBD_POWERLOSS_OOO) {
+        lfs_emubd_decblock(bd->ooo_data);
         bd->ooo_block = -1;
         bd->ooo_data = NULL;
     }