sar crashes with segfault in sar_get_record_timestamp_struct()

Issue

• sar crashes with segfault in sar_get_record_timestamp_struct()

Core was generated by `sar'.
Program terminated with signal 11, Segmentation fault.
#0  sar_get_record_timestamp_struct (curr=<value optimized out>) at sar.c:263
263         rectime = *ltm;
(gdb) bt
#0  sar_get_record_timestamp_struct (curr=<value optimized out>) at sar.c:263
#1  0x0000000000402f22 in read_stats_from_file (from_file=<value optimized out>) at sar.c:868
#2  0x0000000000403460 in main (argc=<value optimized out>, argv=0x7fff919b89b8) at sar.c:1240