Only output message when file is not excluded from build.

Author: Sibras

yasm.props

@@ -14,7 +14,7 @@
       <Parser>0</Parser>
       <OutputFormat>$(IntDir)%(FileName).obj</OutputFormat>
       <CommandLineTemplate>"$(YasmPath)"yasm.exe -Xvc -f win$(PlatformArchitecture) [AllOptions] [AdditionalOptions] "%(FullPath)"</CommandLineTemplate>
-      <ExecutionDescription>Assembling %(Identity)...</ExecutionDescription>
+      <ExecutionDescription>%(Identity)</ExecutionDescription>
     </YASM>
   </ItemDefinitionGroup>
 </Project>

yasm.targets

@@ -40,6 +40,7 @@
       </YASM_tlog>
     </ItemGroup>
     <Message
+      Condition="'@(YASM)' != '' and '%(YASM.ExcludedFromBuild)' != 'true'"
       Importance="High"
       Text="%(YASM.ExecutionDescription)" />
     <WriteLinesToFile
@@ -60,7 +61,7 @@
       TreatWarningsAsErrors="%(YASM.TreatWarningsAsErrors)"
       CommandLineTemplate="%(YASM.CommandLineTemplate)"
       AdditionalOptions="%(YASM.AdditionalOptions)"
- />
+    />
   </Target>
   <Target
     Name="ComputeYASMOutput"