[sysprof] libsysprof-capture: check frame types when peeking

[Christian Hergert <chergert src gnome org>]

commit cb1b7d03fbb1bfb3bfeffbf26535297c27bd5bb6
Author: Christian Hergert <chergert redhat com>
Date:   Sat Feb 15 20:49:47 2020 -0700

    libsysprof-capture: check frame types when peeking

 src/libsysprof-capture/sysprof-capture-reader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/libsysprof-capture/sysprof-capture-reader.c b/src/libsysprof-capture/sysprof-capture-reader.c
index c6c4cc3..888c6e7 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.c
+++ b/src/libsysprof-capture/sysprof-capture-reader.c
@@ -426,7 +426,7 @@ sysprof_capture_reader_peek_frame (SysprofCaptureReader *self,
   if (frame->time > self->end_time)
     self->end_time = frame->time;
 
-  return TRUE;
+  return frame->type > 0 && frame->type < SYSPROF_CAPTURE_FRAME_LAST;
 }
 
 gboolean
@@ -443,7 +443,7 @@ sysprof_capture_reader_peek_type (SysprofCaptureReader    *self,
 
   *type = frame.type;
 
-  return TRUE;
+  return frame.type > 0 && frame.type < SYSPROF_CAPTURE_FRAME_LAST;
 }
 
 static const SysprofCaptureFrame *