Fixed findings

List of Findings

Error: GCC_ANALYZER_WARNING (CWE-476): [#def1]
util-linux-2.42.start/disk-utils/cfdisk.c: scope_hint: In function ‘ui_get_parttype’
util-linux-2.42.start/disk-utils/cfdisk.c:2023:32: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2021|   		char *name;
# 2022|   
# 2023|-> 		cm[i].userdata = (void *) x;
# 2024|   		if (codetypes)
# 2025|   			xasprintf(&name, "%2x %s",

Error: GCC_ANALYZER_WARNING (CWE-401): [#def2]
util-linux-2.42.start/disk-utils/cfdisk.c:2025:25: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2023|   		cm[i].userdata = (void *) x;
# 2024|   		if (codetypes)
# 2025|-> 			xasprintf(&name, "%2x %s",
# 2026|   				fdisk_parttype_get_code(x),
# 2027|   				_(fdisk_parttype_get_name(x)));

Error: GCC_ANALYZER_WARNING (CWE-401): [#def3]
util-linux-2.42.start/include/xalloc.h: scope_hint: In function ‘new_filter’
util-linux-2.42.start/include/xalloc.h:68:13: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(17, 8)’
#   66|   	void *ret = calloc(nelems, size);
#   67|   
#   68|-> 	if (!ret && size && nelems)
#   69|   		err(XALLOC_EXIT_CODE, "cannot allocate %zu bytes", size);
#   70|   	return ret;

Error: GCC_ANALYZER_WARNING (CWE-401): [#def4]
util-linux-2.42.start/login-utils/lslogins.c: scope_hint: In function ‘build_sgroups_string’
util-linux-2.42.start/login-utils/lslogins.c:415:45: warning[-Wanalyzer-malloc-leak]: leak of ‘res’
#  413|   			x = snprintf(p, len, "%u,", sgroups[n]);
#  414|   		else {
#  415|-> 			struct group *grp = getgrgid(sgroups[n]);
#  416|   			if (!grp) {
#  417|   				free(res);

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