trace-cmd-record: Have read_file() only update size if given

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

1 files changed, 2 insertions, 1 deletions

diff --git a/trace-record.c b/trace-record.c
index e10e4d3..7be1e89 100644
--- a/trace-record.c
+++ b/trace-record.c
@@ -1707,7 +1707,8 @@ static char *read_file(char *file, int *psize)
         } while (r);
 
         buf[size] = '\0';
-        *psize = size;
+        if (psize)
+                *psize = size;
         return buf;
 }