Some improvements

rtree-c/src/ReduceC.hs

rtree-c/test/expected/clang-22382/extract.path

rtree-c/test/expected/clang-22382/reduction/p0.path

rtree-c/test/expected/clang-22382/reduction/p1.path

rtree-c/test/expected/clang-22382/reduction/p2.path

rtree-c/test/expected/clang-22382/reduction/p3.path

rtree-c/test/expected/clang-22382/reduction/p4.path

rtree-c/test/expected/clang-22382/reduction/p5.path

rtree-c/test/expected/clang-22382/reduction/p6.path

rtree-c/test/expected/clang-22382/reduction/p7.path

rtree-c/test/expected/clang-22382/reduction/p8.path

rtree-c/test/expected/clang-22382/reduction/p9.path

rtree-c/test/expected/clang-22382/reduction/x7.c

rtree-c/test/expected/clang-22382/reduction/x8.c

rtree-c/test/expected/clang-23353/extract.path

rtree-c/test/expected/clang-23353/reduction/p0.path

rtree-c/test/expected/clang-23353/reduction/p1.path

rtree-c/test/expected/clang-23353/reduction/p2.path

rtree-c/test/expected/clang-23353/reduction/p3.path

rtree-c/test/expected/clang-23353/reduction/p4.path