Fixed bug in multi-line @case structures

[noahmanderson]

Tested with the following commands that had various issues on master:

CaseTest.orig(#39 C^~) Type: Compound command; Building Quota used: 10. Owner: Spite(#9 PWBPaybM). Flags: Censored, Tracing. Size: 397 bytes (309 bytes compressed (22.2%)) Key: UNLOCKED.

----------------------------- Commands executed by compound command ----------------------------- [001] @case $3 do [002] a:@begin [003] @echo a [004] @end [005]
[006] b:@begin [007] @echo b [008] @end [009]
[010] c:@begin [011] @echo c [012] @end [013]
[014] d:@begin [015] @echo d [016] @end [017]
[018] e:@begin [019] @echo e [020] @end [021]
[022] DEFAULT:@begin [023] @echo default [024] @end [025]
[026] @end

Funny enough, if you delete line 25, you'd get different behavior (on master)

I used this command to verify a number of other forms of @case logic still worked:

Casetest(#55 C^) Type: Compound command; Building Quota used: 10. Owner: Spite(#9 PWBPaybM). Flags: Censored. Size: 354 bytes (289 bytes compressed (18.4%)) Key: UNLOCKED.

----------------------------- Commands executed by compound command ----------------------------- [001] @chpid [002] @case $3 do [003] a: @echo a [004] ab: @echo ab [005] b: @echo b [006] c: @echo c [007] d: @echo d [008] e: @echo e [009] f: @echo f [010] 1-9: @echo single digit [011] DEFAULT: @echo default [012] @end