fix clang-tidy warning: google-readability-braces-around-statements

[karel-m]

This is the last patch related to my clang-tidy testing. After this patch the script .ci/clang-tidy.sh should not throw any warning (at least with clang-tidy 6.0.0).

It is related to braces-around-statements for which the clang-tidy has two plugins: google-readability-braces-around-statements and readability-braces-around-statements.

I have chosen less restrictive google-readability-braces-around-statements.

It allows one line statements without braces:

if (something) some_func(1,2,3);

But does not allow:

if (something)
   some_func(1,2,3);

Which should be rewritten as:

if (something) {
   some_func(1,2,3);
}

[sjaeckel]

I somehow prefer if it's written } else { is that also valid? :)

if yes, can you please change it?

[karel-m]

done

[rofl0r]

advantage of

if (something)
   some_func(1,2,3);

is that you can put a breakpoint on the second line

[karel-m]

I have changed:

if (something)
   some_func(1,2,3);

into:

if (something) {
   some_func(1,2,3);
}

So this advantage still applies.