Exit with a correct exit code when outputting to the console

[anroots]

Running the scan command and outputting the result to console would always exit with an exit code of 1 regardless of whether there were any errors found or not.

This messes up CI builds and other usages where the exit code is meaningful.

The bug was caused by invalid assumption in the result value of Output\Console::render: the $fail variable is an integer, not an array.

The following illustrates the previous situation and how using count always resulted in the exit code of 1.

php > $fail = 0;
php > var_dump((count($fail) > 0) ? 1 : 0);
int(1)
php > $fail = 1;
php > var_dump((count($fail) > 0) ? 1 : 0);
int(1)

This patch fixes the bug; Output\Console::render now treats the $fail variable as an integer and returns a correct exit status.