minilzo: Disable internal checks because they cause build errors.

This fixes:
  LINK   ../archiv/oscam-svn8403-fritz33xx-webif.debug
  build/mips-linux-uclibc/minilzo/minilzo.o: In function `_lzo_config_check':
  minilzo.c:(.text+0x678): undefined reference to `__clzsi2'
  collect2: ld returned 1 exit status

Reported by Gorgone.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8404 4b0bc96b-bc66-0410-9d44-ebda105a78c1