Changed variable parsing so struct[n].attr works.

src/interfaces/ecpg/ChangeLog

src/interfaces/ecpg/preproc/descriptor.c

src/interfaces/ecpg/preproc/extern.h

src/interfaces/ecpg/preproc/pgc.l

src/interfaces/ecpg/preproc/preproc.y

src/interfaces/ecpg/preproc/type.c

src/interfaces/ecpg/preproc/type.h

src/interfaces/ecpg/preproc/variable.c

src/interfaces/ecpg/test/num_test.pgc