* tcg.translate_register: check that reg.allocator is not nil before calling its method (in case of "assembler nostackframe" function returning an x87 float compiler tries to translate NR_ST which is used for function result).
* tcg.a_reg_dealloc: ignore NR_NO, prevents creating useless deallocations of NR_DEFAULTFLAGS on MIPS targets which have NR_DEFAULTFLAGS=NR_NO.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29242 3ad0048d-3df7-0310-abae-a5850022a9f2