LEDBeltKit_alt compile errors with Teensy3

[okyeron]

I'm getting these compile errors when trying to upload the LEDBeltKit_alt sketch to Teensy 3.

FWIW - The strandtest and LEDBeltKit sketches works normally.

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LEDbeltKit_alt.pde: In function 'void callback()':
LEDbeltKit_alt.pde:162:62: error: call of overloaded 'gamma(int)' is ambiguous
LEDbeltKit_alt.pde:162:62: note: candidates are:
In file included from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/WProgram.h:6:0,
from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/Arduino.h:1,
from /Applications/Arduino.app/Contents/Resources/Java/libraries/SPI/SPI.h:15,
from LEDbeltKit_alt.pde:20:
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/4.7.2/include-fixed/math.h:287:15: note: double gamma(double)
LEDbeltKit_alt.pde:82:6: note: byte gamma(byte)
LEDbeltKit_alt.pde:163:62: error: call of overloaded 'gamma(int)' is ambiguous
LEDbeltKit_alt.pde:163:62: note: candidates are:
In file included from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/WProgram.h:6:0,
from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/Arduino.h:1,
from /Applications/Arduino.app/Contents/Resources/Java/libraries/SPI/SPI.h:15,
from LEDbeltKit_alt.pde:20:
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/4.7.2/include-fixed/math.h:287:15: note: double gamma(double)
LEDbeltKit_alt.pde:82:6: note: byte gamma(byte)
LEDbeltKit_alt.pde:164:62: error: call of overloaded 'gamma(int)' is ambiguous
LEDbeltKit_alt.pde:164:62: note: candidates are:
In file included from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/WProgram.h:6:0,
from /Applications/Arduino.app/Contents/Resources/Java/hardware/teensy/cores/teensy3/Arduino.h:1,
from /Applications/Arduino.app/Contents/Resources/Java/libraries/SPI/SPI.h:15,
from LEDbeltKit_alt.pde:20:
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/4.7.2/include-fixed/math.h:287:15: note: double gamma(double)
LEDbeltKit_alt.pde:82:6: note: byte gamma(byte)