fixed more compiler warnings

src/seq/seqCom.h

src/seq/seqPvt.h

src/seq/seq_if.c

src/seq/seq_mac.c

src/seq/seq_main.c

src/seq/seq_prog.c

src/seq/seq_qry.c

src/seq/seq_task.c

src/snc/analysis.c

src/snc/gen_code.c

src/snc/lexer.h

src/snc/parse.c

src/snc/snl.lem

src/snc/snl.re