resize.pencil.c: revert to the version before introducing pencil/math.h
resize.pencil.c: revert to the version before introducing pencil/math.h


Former-commit-id: 191f73f8ba8f490b8a6ca79c2b061303fcc51472
rbaghdadi/pencil-benchmark,dividiti/pencil-benchmark,pencil-language/pencil-benchmark,rbaghdadi/pencil-benchmark,pencil-language/pencil-benchmark,dividiti/pencil-benchmark,dividiti/pencil-benchmark,pencil-language/pencil-benchmark,rbaghdadi/pencil-benchmark