[master] fix API mismatch bug in DLZ

3775.	[bug]		dlz_dlopen driver could return the wrong error
			code on API version mismatch, leading to a segfault.
			[RT #35495]

CHANGES

+3775.	[bug]		dlz_dlopen driver could return the wrong error
+			code on API version mismatch, leading to a segfault.
+			[RT #35495]
+
 3774.	[func]		When using "request-nsid", log the NSID value in
 			printable form as well as hex. [RT #20864]
 

bin/named/unix/dlz_dlopen_driver.c

@@ -335,6 +335,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 			   "dlz_dlopen: %s: incorrect driver API version %d, "
 			   "requires %d",
 			   cd->dl_path, cd->version, DLZ_DLOPEN_VERSION);
+		result = ISC_R_FAILURE;
 		goto failed;
 	}
 

bin/named/win32/dlz_dlopen_driver.c

@@ -319,6 +319,7 @@ dlopen_dlz_create(const char *dlzname, unsigned int argc, char *argv[],
 			   "dlz_dlopen: %s: incorrect driver API version %d, "
 			   "requires %d",
 			   cd->dl_path, cd->version, DLZ_DLOPEN_VERSION);
+		result = ISC_R_FAILURE;
 		goto failed;
 	}