fixed #155 added Quicklook like preview for attachments

MacPass/NSError+Messages.m

@@ -7,11 +7,16 @@
 //
 
 #import "NSError+Messages.h"
-#import "KPKErrors.h"
+
+NSString *const MPErrorDomain       = @"com.hicknhack.macpass.error";
 
 @implementation NSError (Messages)
 
 - (NSString *)descriptionForErrorCode {
   return [NSString stringWithFormat:@"%@ (%ld)", [self localizedDescription], [self code] ];
 }
+
++ (NSError *)errorWithCode:(NSInteger)code description:(NSString *)description {
+  return [[NSError alloc] initWithDomain:MPErrorDomain code:code userInfo:@{ NSLocalizedDescriptionKey: description }];
+}
 @end