Why didn't the compiler warn me about an empty if-statement?

I'm using Keil uVision v4.74 and have enabled the option "All Warnings".

I wrote the following intentional code:

if(condition matched)
{
 //do something
}

When I rebuilt my project, I got 0 errors, 0 warnings.

However, when I accidentally wrote:

if(condition matched);
{
 //do something
}

I also got 0 errors, 0 warnings.

It was next to impossible for me to find out that a small ; following the if condition was the root of the problem.

Why didn't the compiler treat it as a warning and inform me?