heapsnapshot.patch

diff --git a/src/profiler/heapsnapshot.c b/src/profiler/heapsnapshot.c
index 071954f..a4a6d9c 100644
--- a/src/profiler/heapsnapshot.c
+++ b/src/profiler/heapsnapshot.c
@@ -820,7 +820,7 @@ void references_to_filehandle(MVMThreadContext *tc, MVMHeapSnapshotCollection *c
 
         MVMuint64 maxval = MAX(kind, cindex);
 
-        if (maxval + 1 >= 1l << 32) {
+        if (maxval + 1 >= (UINT64_C(1) << 32)) {
             fputc('6', fh);
             fwrite(&descr, sizeof(MVMuint8), 1, fh);
             fwrite(&kind, sizeof(MVMuint64), 1, fh);