EWS: avoid mime content String conversion

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@2270 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/java/davmail/exchange/ews/EWSMethod.java

@@ -545,7 +545,9 @@ public abstract class EWSMethod extends PostMethod {
             writer.write(">");
             if (mimeContent != null) {
                 writer.write("<t:MimeContent>");
-                writer.write(new String(mimeContent));
+                for (byte c : mimeContent) {
+                    writer.write(c);
+                }
                 writer.write("</t:MimeContent>");
             }
             if (referenceItemId != null) {