Remove an unnecessary null pointer check

[Yogaraj-Alamenda]

Is it from the code review you figured out

Yes.

👀 A source code search can help also by the means of the GitHub interface.

or through some static analysis.

💭 I am curious if another software developer (besides me) can get into the mood to apply a corresponding update suggestion which could be generated by the software “Coccinelle” (also with the help of a variant from the following script).

@Remove_unnecessary_pointer_checks@
expression x;
@@
-if (\(x != 0 \| x != NULL\))
    free(x);

Originally posted by @elfring in #126

Why were further update candidates left over? 🤔

QATzip/src/qatzip.c

Lines 470 to 477 in aec427a

	if (NULL != g_process.dc_inst_handle) {
	free(g_process.dc_inst_handle);
	g_process.dc_inst_handle = NULL;
	}
	if (NULL != g_process.qz_inst) {
	free(g_process.qz_inst);
	g_process.qz_inst = NULL;
	}