Fix target leaf carbon when leaves are off

The target leaf carbon should be zero when leaves are off.  This was accidentally removed when deleting some code that should be incorporated when pull request NGEET#801 (Multiple updates to drought deciduous phenology) is incorporated.

parteh/PRTAllometricCarbonMod.F90

@@ -485,6 +485,16 @@ subroutine DailyPRTAllometricCarbon(this)
     call bstore_allom(dbh,ipft,canopy_trim,target_store_c)
 
 
+
+    ! -----------------------------------------------------------------------------------
+    ! II 1/2. Update target biomass based on the leaf status.
+    ! -----------------------------------------------------------------------------------
+    select case (leaf_status)
+    case (leaves_off)
+       target_leaf_c   = 0.0_r8
+    end select
+
+
     ! -----------------------------------------------------------------------------------
     ! III.  Prioritize some amount of carbon to replace leaf/root turnover
     !         Make sure it isnt a negative payment, and either pay what is available
@@ -1120,6 +1130,16 @@ subroutine DailyPRTAllometricCarbonSimpler(this)
     call bstore_allom(dbh,ipft,canopy_trim,target_store_c)
 
 
+
+    ! -----------------------------------------------------------------------------------
+    ! II 1/2. Update target biomass based on the leaf status.
+    ! -----------------------------------------------------------------------------------
+    select case (leaf_status)
+    case (leaves_off)
+       target_leaf_c   = 0.0_r8
+    end select
+
+
     ! -----------------------------------------------------------------------------------
     ! III.  If carbon is available, bring all the pools as close to the allometry
     !       as possible.  This also includes the storage pool, even though carbon may