Make BC_INC a GC point when we don’t use tagging

It can allocate, and the IfNil benchmark runs out of memory.
Ooops.

Signed-off-by: Stefan Marr <git@stefan-marr.de>

Author: smarr

src/interpreter/InterpreterLoop.h

@@ -308,7 +308,13 @@ LABEL_BC_RETURN_SELF: {
 LABEL_BC_INC:
     PROLOGUE(1);
     doInc();
+// doInc allocates memory, and if we are not carefully, benchmarks such as the
+// IfNil benchmark will allocated but not reach a GC point
+#if USE_TAGGING
     DISPATCH_NOGC();
+#else
+DISPATCH_GC();
+#endif
 
 LABEL_BC_DEC:
     PROLOGUE(1);