Further cleanups and some bug fixes in the error handling during cpp and

compilation. Errors in resolv, handle_inherit and handle_import are sent to
compile_exception, but those thrown by compile_error, compile_warning and
compile_exception are handled by the normal handle_error. Replaced some
more SAFE_APPLY_MASTER with safe_apply_handler.

Rev: src/cpp.c:1.93
Rev: src/interpret.c:1.243
Rev: src/interpret.h:1.98
Rev: src/language.yacc:1.260
Rev: src/las.c:1.265
Rev: src/preprocessor.h:1.45
Rev: src/program.c:1.366
Rev: src/program.h:1.143