fixed segmentation fault when calling "audit perf" command

In this patch added an initialization pointers "time_in_opp_t0",
"time_in_opp_t1", "time_in_opp_cnt" with value NULL at the beginning
of the function "audit_performances".
Because if the function "cpufreq_opp_nbr_get" returns 0
(file ".../time_in_state" is absent), then the memory for them
is not allocated (pointers are remain uninitialized) and attempt
to release allocated memory for them in the end of the function
"audit_performances" results in segmentation fault.

Signed-off-by: Oleksandr_Tyshchenko <oleksandr.tyshchenko@ti.com>

common/audit.c

@@ -102,9 +102,9 @@ int audit_performances(FILE *stream, unsigned int duration, unsigned int delay)
 	unsigned int emif_delta_cycles,
 		emif_delta_busy_cycles;
 	double emif_load;
-	uint64_t *time_in_opp_t0;
-	uint64_t *time_in_opp_t1;
-	uint64_t *time_in_opp_cnt;
+	uint64_t *time_in_opp_t0 = NULL;
+	uint64_t *time_in_opp_t1 = NULL;
+	uint64_t *time_in_opp_cnt = NULL;
 	uint64_t total_trans_t0, total_trans_t1, total_trans_cnt;
 	unsigned int i;
 	uint64_t sec, msec, usec, active_c0_time;