Semi reasonable refactor

rtree-c/src/ReduceC.hs

rtree-c/test/cases/small/addr.c

rtree-c/test/cases/small/array.c

rtree-c/test/cases/small/for.c

rtree-c/test/cases/small/fparam.c

rtree-c/test/expected/addr/main.c

rtree-c/test/expected/addr/reduction/r00000.c

rtree-c/test/expected/addr/reduction/r00001.c

rtree-c/test/expected/addr/reduction/r00010.c

rtree-c/test/expected/addr/reduction/r00011.c

rtree-c/test/expected/addr/reduction/r00100.c

rtree-c/test/expected/addr/reduction/r00101.c

rtree-c/test/expected/addr/reduction/r00110.c

rtree-c/test/expected/addr/reduction/r00111.c

rtree-c/test/expected/addr/reduction/r01000.c

rtree-c/test/expected/addr/reduction/r01001.c

rtree-c/test/expected/addr/reduction/r01010.c

rtree-c/test/expected/addr/reduction/r01011.c

rtree-c/test/expected/addr/reduction/r01100.c

rtree-c/test/expected/addr/reduction/r01101.c