revert commits improved performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)

Following commits are reverted:
mjsousa 0b275a2 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- increase hardcoded limit to 499
mjsousa 2228799 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- Add comments!!
mjsousa ce81fa6 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)"

The reason is that they cause regression in some cases (if function is
used as argument for function block, for example) and this is not
fixed for a long time.

Source: matiec
Section: devel
Priority: standard
Maintainer: edouard <edouard.tisserant@gmail.com>
Build-Depends: debhelper (>= 5), bison, flex
Standards-Version: 3.7.2

Package: matiec
Architecture: any
Depends: ${shlibs:Depends}, ${misc:Depends}
Description: The IEC to ANSI-C compiler
 Compiles ST/IL/SFC code into ANSI-C code