[OE-core] [PATCH] lib/oe/package_manager: Handle empty package list in opkg case

[Richard Purdie]

If you build buildtools-tarball with opkg as the package manager, it
passes in an empty target packages list and fails.

This allows the code to cope with an empty package list (in sync
with the rpm backend).

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

diff --git a/meta/lib/oe/package_manager.py b/meta/lib/oe/package_manager.py
index c51e88b..630b957 100644
--- a/meta/lib/oe/package_manager.py
+++ b/meta/lib/oe/package_manager.py
@@ -1512,7 +1512,7 @@ class OpkgPM(PackageManager):
         self.deploy_dir_unlock()
 
     def install(self, pkgs, attempt_only=False):
-        if attempt_only and len(pkgs) == 0:
+        if not pkgs:
             return
 
         cmd = "%s %s install %s" % (self.opkg_cmd, self.opkg_args, ' '.join(pkgs))