Loan gets approved in spite of "Approved Amount" and "Transaction Amount" field being blank

[AbhilashG97]

Summary:

Loan gets approved in spite of "Approved Amount" and "Transaction Amount" field being blank. An appropriate response like a toast message stating that the field cannot be blank would be suitable.

Steps to reproduce:

Step 1) Open the app.
Step 2) Tap on the Clients fragment from the navigation drawer.
Step 3) Select a Client.
Step 4) Tap on Loan Accounts and select an account in which a loan needs to be approved.
Step 5) Tap on "Approve Loan" button.
Step 6) Leave the "Approved Amount" and "Transaction Amount" field empty.
Step 6) Tap on Submit.

Expected behavior:

The loan shouldn't get approved and an appropriate error message should notify the user about the blank fields.

Observed behavior:

The loan gets approved in spite of the "Approved Amount" and "Transaction Amount" field being blank.

Device and Android version:

Device : Motorola Moto G 1st Generation [XT1033] [Falcon]
ROM : CyanogenMod 13.0 Snapshot build

GIF:

[AbhilashG97]

I would like to work on this issue.

[AbhilashG97]

I have made appropriate changes, please review my pull request and kindly let me know if I have to make any further changes.
Pull request - #668

[therajanmaurya]

fix in #668