Invalid percentage value during installation of 7.5.4

[sachinpandhare]

Description of the Issue

When I started auto update prompted by notepad++, initially it showed a very huge value for percentage completion.
In my case, I was updating from 7.5.1 to 7.5.4.
Snapshot attached.
It seems to be a divide by zero sort of issue.
There must be a minor change that needs to check for the new installer size and use it when more than 0 or something similar. or possibly at the time of % calculation the installer size was not initialized(?).

Steps to Reproduce the Issue

1. Update from 7.5.1 to 7.5.4. This may possibly also apply for any update or from any version to 7.5.4.

Expected Behavior

• The installer percentage should start from 0%.

Actual Behavior

• Initial installation percentage was 9223372036854775808%.

Debug Information

Notepad++ v7.5.4 (64-bit)
Build time : Jan 1 2018 - 01:50:29
Path : C:\Program Files\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS : Windows 10 (64-bit)
Plugins : DSpellCheck.dll mimeTools.dll NppConverter.dll

[MarcoMiltenburg]

I just saw that this is still happening: