parse-events: Allow pevent_read_number_field() to have NULL field

Let pevent_read_number_field() have a NULL field. Just return -1
if one does not exist.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/parse-events.c b/parse-events.c
index f0b0324..a959ebc 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -2693,6 +2693,8 @@ unsigned long long pevent_read_number(struct pevent *pevent,
 int pevent_read_number_field(struct format_field *field, const void *data,
                              unsigned long long *value)
 {
+        if (!field)
+                return -1;
         switch (field->size) {
         case 1:
         case 2: