trace-cmd: Fix NULL pointer deference for use without plugins

The code that added --func-stack introduced a reference to
the variable "plugins" when it was never set to anything.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/trace-record.c b/trace-record.c
index 031e084..9d1218a 100644
--- a/trace-record.c
+++ b/trace-record.c
@@ -2070,7 +2070,7 @@ void trace_record (int argc, char **argv)
                 }
         }
 
-        if (strncmp(plugin, "function", 8) == 0 &&
+        if (plugin && strncmp(plugin, "function", 8) == 0 &&
             func_stack && !filter_funcs)
                 die("Must supply function filtering with --func-stack\n");