Arduino 1.5.6-r2 The directive " #if " not works properly

[K5CZ]

Arduino 1.5.6-r2 IDE and Nightly build

Conditional #include is also processed although the condition is evaluated as FALSE

Source code example:

if defined(something_undefined)

Serial.print( "something_undefined is defined" ); //may not be printed and yes - is not printed

include //may not be included but yes - IS included!

else

Serial.print( "something_undefined is not defined" ); //may be printed and yes - is printed

endif

[ffissore]

Fixed by #3779