[PATCH] debianize: Use weak defaults

[Vijai Kumar K <Vijaikumar_Kanagarajan@mentor.com>]

We use default assignments(?=) in an include file. If the the dpkg
class is inherited before this assignment then we get the wrong default
value defined in the debianze class.

Use weak defaults in the class so that defaults in the include file are
honoured.

Signed-off-by: Vijai Kumar K <Vijaikumar_Kanagarajan@mentor.com>
---
 meta/classes/debianize.bbclass | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/meta/classes/debianize.bbclass b/meta/classes/debianize.bbclass
index 764477c..1197f3d 100644
--- a/meta/classes/debianize.bbclass
+++ b/meta/classes/debianize.bbclass
@@ -3,12 +3,12 @@
 #
 # SPDX-License-Identifier: MIT
 
-CHANGELOG_V ?= "${PV}"
+CHANGELOG_V ??= "${PV}"
 DPKG_ARCH ??= "any"
-DEBIAN_BUILD_DEPENDS ?= ""
-DEBIAN_DEPENDS ?= ""
-DESCRIPTION ?= "must not be empty"
-MAINTAINER ?= "Unknown maintainer <unknown@example.com>"
+DEBIAN_BUILD_DEPENDS ??= ""
+DEBIAN_DEPENDS ??= ""
+DESCRIPTION ??= "must not be empty"
+MAINTAINER ??= "Unknown maintainer <unknown@example.com>"
 
 deb_add_changelog() {
 	changelog_v="${CHANGELOG_V}"
-- 
2.17.1