Fix Dao weights and loading

Author: AhmedHanafy725

packages/tfchain_client/lib/models/dao.dart

@@ -45,7 +45,11 @@ class ProposalInfo {
         if (entry.value == null) {
           args[entry.key] = entry.value;
         } else {
-          args[entry.key] = String.fromCharCodes(entry.value);
+          try {
+            args[entry.key] = String.fromCharCodes(entry.value);
+          } catch (e) {
+            args[entry.key] = entry.value;
+          }
         }
       }
     }

packages/tfchain_client/lib/src/dao.dart

@@ -101,10 +101,10 @@ class QueryDao {
     final total = totalAyeWeight + totalNayeWeight;
     if (total > 0) {
       if (typeAye) {
-        return ((totalAyeWeight / total) * 100).toInt();
+        return ((totalAyeWeight / total) * 100).round();
       }
 
-      return ((totalNayeWeight / total) * 100).toInt();
+      return ((totalNayeWeight / total) * 100).round();
     }
     return 0;
   }