Fix #1625: Allow 0 byte files to be uploaded

CHANGE.md

@@ -5,6 +5,7 @@ Change Log: `bootstrap-fileinput`
 
 **Date**: _under development_
 
+- (enh #1625): Default `minFileSize` to -1 to allow zero byte files to be uploaded.
 - (enh #1617): Better encoded file id generation.
 - (enh #1612, #1614): Remove unsupported script-inline from template and CSP buffer.
 

js/fileinput.js

@@ -5912,7 +5912,7 @@
         resizeQuality: 0.92,
         resizeDefaultImageType: 'image/jpeg',
         resizeIfSizeMoreThan: 0, // in KB
-        minFileSize: 0,
+        minFileSize: -1,
         maxFileSize: 0,
         maxFilePreviewSize: 25600, // 25 MB
         minFileCount: 0,