Description:
------------
So, I know that due to the way computers store float numbers, we end up with some 
oddities. This BUG is NOT about that. Instead, I found some inconsistencies on how 
PHP handle that, and it's easy to think of cases that those inconsistencies would 
end up causing lots of wasted hours debugging.

Please see test script, it should be pretty self explanatory.
My change request is that, since float / echo deal with that inconsistency 
(rounding 0.3000000000000000444089209850062616169452667236328125 to 0.3), so 
should control flow functions like IF, WHILE, etc...

Tested on PHP 5.3.22 and PHP 5.4.12

Test script:
---------------
<?php
$a = 0.1;
$b = 0.2;
var_dump($a + $b);
if($a + $b <= 0.3)
    echo "All is right in the universe!";
else
    echo "Something is wrong here!";
?>

Expected result:
----------------
float(0.3)
All is right in the universe!

Also, this result is acceptable:

float(0.3000000000000000444089209850062616169452667236328125)
Something is wrong here!

Actual result:
--------------
float(0.3)
Something is wrong here!