asset image fixed.

lib/models/device/asset.dart

@@ -115,7 +115,9 @@ class Asset {
     }
     comment = json['comment'];
     tagCode = json['tagCode'];
+    assetPhoto = json['assetPhoto'];
   }
+
   num id;
   String assetSerialNo;
   String systemID;
@@ -165,6 +167,7 @@ class Asset {
   String comment;
   String tagCode;
   String assetPhoto;
+
   Asset copyWith({
     num id,
     String assetSerialNo,
@@ -267,6 +270,7 @@ class Asset {
         tagCode: tagCode ?? this.tagCode,
         assetPhoto: assetPhoto ?? this.assetPhoto,
       );
+
   Map<String, dynamic> toJson() {
     final map = <String, dynamic>{};
     map['id'] = id;