This fixes syntax and indentation of a58d73b5

Toolchain: Add more compiler options, add note about -Wfloat-conversion warning (available with GCC 4.9). Needs work.

This is a work-around until #1741 makes it to the multiplatform version

This is a work-around until #1741 makes it to the multiplatform version

This is a work-around until #1741 makes it to the multiplatform version

Also check if input variable is 0 and fix indentation