Add back markUsed in symChoice

compiler/semtempl.nim

@@ -67,6 +67,8 @@ proc symChoice(c: PContext, n: PNode, s: PSym, r: TSymChoiceRule;
     # for instance 'nextTry' is both in tables.nim and astalgo.nim ...
     if not isField or sfGenSym notin s.flags:
       result = newSymNode(s, info)
+      markUsed(c, info, s)
+      onUse(info, s)
     else:
       result = n
   elif i == 0:

nimsuggest/tests/tgenerics.nim

@@ -14,5 +14,5 @@ main()
 discard """
 $nimsuggest --tester $file
 >def $1
-def;;skProc;;tgenerics.printHelloValue;;proc (hello: Hello[printHelloValue.T]);;$file;;5;;5;;"";;100
+def;;skProc;;tgenerics.printHelloValue.printHelloValue;;proc (hello: Hello[system.float]){.gcsafe, raises: <inferred> [].};;$file;;5;;5;;"";;100
 """