@c Set option data
This function sets a long value for an option. If the option did not exist before in the symbol table it is inserted. If the symbol table was empty (aka OptionsTable pointed NULL) the symbol table is also created.
If the symbol already existed with some long value then the new value is stored in the already allocated place and thus the caller may store the pointer to the long returned by GetR and access possibly updated data without searching the table again and again.
int options_Set(pExecuteObject pEo,
The function returns zero if the option was set or 1 if there was a memory failure.