Try to handle missing build.counter

Author: bahusoid

default.build

@@ -29,6 +29,7 @@
 	<target name="build"
 		depends="init prepare-build-directory nuget.set-properties"
 		description="Builds NHibernate in the current configuration">
+		<property name="build.counter" value="" overwrite="false" />
 
 		<exec program="dotnet" verbose="true">
 			<arg value="msbuild" />
@@ -39,8 +40,8 @@
 			<arg value="/p:IncludeSymbols=&quot;True&quot;" />
 			<arg value="/p:IncludeSource=&quot;True&quot;" />
 			<arg value="/p:PackageOutputPath=&quot;${path::get-full-path(nuget.nupackages.dir)}&quot;" />
-			<!-- build.counter is not avaialbe by default. It needs to be exposed in Team City as system paramter system.build.counter with value %build.counter% -->
-			<arg value="/p:BuildNumber=&quot;${build.counter}&quot;" if="${property::exists('build.counter')}" />
+			<!-- build.counter is not available by default. It needs to be exposed in Team City as system parameter system.build.counter with value %build.counter% -->
+			<arg value="/p:BuildNumber=&quot;${build.counter}&quot;" />
 			<arg value="/t:Restore" />
 			<arg value="/t:Rebuild" />
 			<arg value="/v:q" />