[PATCH] Fix old GCC build error in perf/util/trace-event-parse.c:parse_proc_kallsyms()

[Ingo Molnar]

Old GCC (4.1) does not see through the code flow of parse_proc_kallsyms() 
and gets confused about the status of 'fmt':

 util/trace-event-parse.c: In function ‘parse_proc_kallsyms’:
 util/trace-event-parse.c:189: warning: ‘fmt’ may be used uninitialized in this 
function
 make: *** [util/trace-event-parse.o] Error 1

Help out GCC by initializing 'fmt' to NULL.

Thanks,

        Ingo

Signed-off-by: Ingo Molnar <mi...@kernel.org>

diff --git a/tools/perf/util/trace-event-parse.c 
b/tools/perf/util/trace-event-parse.c
index fe7a27d..e9e1c03 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -186,7 +186,7 @@ void parse_proc_kallsyms(struct pevent *pevent,
        char *next = NULL;
        char *addr_str;
        char *mod;
-       char *fmt;
+       char *fmt = NULL;
 
        line = strtok_r(file, "\n", &next);
        while (line) {
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