--- a/multipaint.pde	Fri Jul 06 05:27:49 2018 +0300
+++ b/multipaint.pde	Fri Jul 06 05:28:15 2018 +0300
@@ -300,19 +300,29 @@
 }
 
 
+Blob mpMakeBinaryBlob(byte[] data)
+{
+    var blob = null;
+    if (data == null)
+        return null;
+
+    if (typeof(data) == "string")
+        blob = new Blob([data], {type: "application/octet-stream"});
+    else
+    if (typeof(data) == "object")
+        blob = new Blob([new Uint8Array(data)], {type: "application/octet-stream"});
+
+    return blob;
+}
+
+
 //
 // "Save" a byte array to file. Basically creates a blob URI
 // and dumps it in the DOM, giving user a download.
 //
 bool mpSaveBinaryFile(String name, byte[] data)
 {
-    var blob = null;
-    if (typeof(data) == "string")
-        blob = new Blob([data], {type: "application/octet-stream"});
-    else
-    if (typeof(data) == "object")
-        blob = new Blob([new Uint8Array(data)], {type: "application/octet-stream"});
-
+    var blob = mpMakeBinaryBlob(data);
     if (blob == null)
     {
         console.log("Could not create BLOB from data.");