Incorrect copy constructor creates memory leak

[FJShen]

accel-sim-framework/gpu-simulator/trace-parser/trace_parser.cc

Lines 44 to 49 in 3c96d32

	inst_trace_t::inst_trace_t(const inst_trace_t &b) {
	if (memadd_info != NULL) {
	memadd_info = new inst_memadd_info_t();
	memadd_info = b.memadd_info;
	}
	}