Small improvement

app/src/main/java/eu/faircode/email/Core.java

@@ -1473,7 +1473,7 @@ class Core {
         if (message == null || !message.content)
             return;
 
-        int size = (int) message.getFile(context).length();
+        long size = message.getFile(context).length();
         if (size == 0)
             return;
 

app/src/main/java/eu/faircode/email/DaoMessage.java

@@ -325,7 +325,7 @@ public interface DaoMessage {
     int setMessageContent(long id, boolean content, String preview, String warning);
 
     @Query("UPDATE message SET size = :size WHERE id = :id")
-    int setMessageSize(long id, Integer size);
+    int setMessageSize(long id, Long size);
 
     @Query("UPDATE message SET headers = :headers WHERE id = :id")
     int setMessageHeaders(long id, String headers);