Merge branch '3965-source-never-read-master.c' into 'main'

Fix scan-build issue: initialized value never read

Closes #3965

See merge request isc-projects/bind9!7725

Author: matje

CHANGES

@@ -1,3 +1,6 @@
+6129.	[cleanup]	Value stored to 'source' during its initialization is
+			never read. [GL #3965]
+
 6128.	[bug]		Fix an omission in an earlier commit to avoid a race
 			between the 'dns__catz_update_cb()' and
 			'dns_catz_dbupdate_callback()' functions. [GL #3968]

lib/dns/master.c

@@ -1043,7 +1043,7 @@ load_text(dns_loadctx_t *lctx) {
 	char *lhs = NULL;
 	char *gtype = NULL;
 	char *rhs = NULL;
-	const char *source = "";
+	const char *source;
 	unsigned long line = 0;
 	bool explicit_ttl;
 	char classname1[DNS_RDATACLASS_FORMATSIZE];