* bc-int.h (yasm_bytecode): Add new pointer to array symrecs. This is a

* bc-int.h (yasm_bytecode): Add new pointer to array symrecs.  This is a
NULL-terminated array of labels that point to this bytecode (as the bytecode
previous to the label).  NULL if no labels point to this bytecode.

* bytecode.c (yasm_bc_create_common): Initialize symrecs variable to NULL.
* bytecode.c (yasm_bc_destroy): Delete symrecs variable.

* bytecode.h (yasm_bc__add_symrec): Declare new function.
* bytecode.c (yasm_bc__add_symrec): New.

* symrec.c (yasm_symtab_define_label): Call yasm_bc__add_symrec().

This new functionality is needed to make writing certain dbgfmt routines
easier.

svn path=/trunk/yasm/; revision=1147