Assemble: merge to large 'if' statements.

Assemble: merge to large 'if' statements.

In assemble, we see (inside a 'for' loop):

 if (condition) {
    lots of stuff
 } else
    something

 small thing

 if (same condition) {
     lots more stuff
     break;
 }

where 'condition' cannot be changed in the middle.

So simplify this to

 if (condition) {
    lots of stuff
    small thing
    lots more stuff
    break;
 }

 something
 small thing

which duplicates the small thing, but provides much
conceptual simplicity.

Signed-off-by: NeilBrown <neilb@suse.de>