re PR rtl-optimization/12440 (gcc 3.3.1 on i386 linux 2.4.22 crashes during compilation of quicktime4linux 2.0.0)

	PR optimization/12440
	* loop.c: Include ggc.h.
	(loop_optimize): Run garbage collector between optimization of loops.
	* Makefile.in (loop.o): Add GGC_H dependency.

From-SVN: r76213