Fixes #57, happy New Years!

js/transaction.js

@@ -688,6 +688,9 @@ $(function() {
 		// figure out remaining hours that can be redeemed if some, but not all, volunteer hours have been redeemed.
 		var remaining, year = d.getFullYear(), exceeded_sweat_equity_limit = false, price_after_redeeming, spinner_difference;
 		if (volunteer) {
+			
+			// will need to figure out these values when there isn't a property for the new year
+			if (volunteer.hasOwnProperty(year)) {
 				var vhr = obj.volunteer_hour_value * volunteer[year].volunteer_hours_redeemed + (spinner_value * obj.volunteer_hour_value);
 				//console.log(obj.volunteer_hour_value + " * " +  volunteer[year].volunteer_hours_redeemed + " = " + vhr );
 				remaining = obj.current_year_volunteer_hours - volunteer[year].volunteer_hours_redeemed;	
@@ -699,7 +702,7 @@ $(function() {
 					//console.log(spinner_difference + " " + price_after_redeeming);
 				}
 			}
-
+		}	
 
 		// no volunteer_hours_redeemed or still less than the allowable sweat_equity_hours
 		
@@ -755,6 +758,7 @@ $(function() {
 					}
 					//console.log(price_after_redeeming + " - " + redeemable_value + " * ." + discount);
 				} else {
+					// Never redeemed before
 					amount.val(price - redeemable_value);
 				}	
 			}
@@ -1179,7 +1183,7 @@ $(function() {
 						if ((volunteer_hours && volunteer_hours.length)) {						
 							
 							var max; 
-							if ((remaining || remaining === 0) && obj.volunteer) {
+							if ((remaining || remaining === 0) && (obj.volunteer &&  volunteer.hasOwnProperty(year))) {
 								max = remaining;
 							} else {
 								max = obj.current_year_volunteer_hours;