Simplify intermediate 16-bit register usage

LR35902/LR35902.cs

@@ -533,7 +533,8 @@ namespace LR35902
                                 case 0: // NOP
                                     break;
                                 case 1: // GB: LD (nn),SP
-                                    this.Bus.Address.Assign(this.FetchWord());
+                                    this.FetchWord();
+                                    this.Bus.Address.Assign(this.Intermediate);
                                     this.SetWord(this.SP);
                                     break;
                                 case 2: // GB: STOP

LR35902/SM83.HarteTest/SM83.HarteTest.csproj

@@ -9,6 +9,14 @@
 	<AnalysisLevel>latest-all</AnalysisLevel>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <WarningLevel>9999</WarningLevel>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <WarningLevel>9999</WarningLevel>
+  </PropertyGroup>
+
 	<ItemGroup>
 		<ProjectReference Include="..\..\EightBit\EightBit.csproj" />
 		<ProjectReference Include="..\LR35902.csproj" />