Merge pull request #15 from greymass/fixing-cast-error

Fixing cast error causing iOS crash

Sources/EOSIO/ABIDecoder.swift

@@ -109,7 +109,16 @@ public extension ABIDecoder {
         case is UInt.Type:
             return UInt(try self.readVaruint()) as! T
         case let abiType as ABIDecodable.Type:
-            return try abiType.init(fromAbi: self) as! T
+            let decodedAbiType = try abiType.init(fromAbi: self)
+
+            // Instead of forcefully casting, verify the type at runtime.
+            if let result = decodedAbiType as? T {
+                return result
+            } else {
+                // As a temporary solution, we'll just return an empty array whenever a non supported type is found.
+                // This is not ideal, but it's better than crashing the app.
+                return [] as! T
+            }
         default:
             throw Error.typeNotConformingToABIDecodable(type)
         }