symb: Extend symbDump() to show array dimensions
parser: Remove check_exprtb variable in cVarDecl()

The dimensions > 0 check should be good enough, since dimensions will only
be set to something > 0 by the cArrayDecl() call that fills the exprTB().
parser: Fix error recovery in case of ellipsis in dynamic array
symb: Make symbDump() show field offset
symb: Solve out unnecessary variable in symbAddField()
symb: Solve out unnecessary iif() in symbAddField()
symb: Simplify offset/bitpos calculation in symbAddField()
rtlib: Fix file eof() to use 64bit ftello() instead of 32bit ftell()