Call "Check_defaults" in lh_build.

This ensures that incompatible configurations that are created by editing
files in config/ are detected when building the image via lh_build.

This also has the side-effect of ensuring that configuration warnings (if
any) appear for live-magic.

Signed-off-by: Chris Lamb <chris@chris-lamb.co.uk>

helpers/lh_build

@@ -41,6 +41,13 @@ then
 	exit 1
 fi
 
+# Reading configuration files
+Read_conffile config/all config/common config/bootstrap config/chroot config/binary config/source
+Set_defaults
+
+# Checking defaults
+Check_defaults
+
 # Bootstrapping system
 lh_bootstrap ${*}