I solved the problem with the help of this thread:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1237653105
Just added
#undef int
#undef char
#undef long
#undef byte
#undef float
#undef abs
#undef round
before the "#endif" in the LedControl.h.
Works like a charm 