Interfaces: Remove NV_EXTENSIONS from two more headers.

This also fixes some cpp files that uncover issues when building
with the flags turned off.
diff --git a/SPIRV/SpvBuilder.h b/SPIRV/SpvBuilder.h
index 0836fff..7c1d421 100644
--- a/SPIRV/SpvBuilder.h
+++ b/SPIRV/SpvBuilder.h
@@ -131,10 +131,8 @@
     Id makeSamplerType();
     Id makeSampledImageType(Id imageType);
 
-#ifdef NV_EXTENSIONS
     // accelerationStructureNV type
     Id makeAccelerationStructureNVType();
-#endif
 
     // For querying about types.
     Id getTypeId(Id resultId) const { return module.getTypeId(resultId); }
@@ -371,10 +369,8 @@
         Id component;
         Id texelOut;
         Id lodClamp;
-#ifdef NV_EXTENSIONS
         Id granularity;
         Id coarse;
-#endif
         bool nonprivate;
         bool volatil;
     };
diff --git a/StandAlone/ResourceLimits.cpp b/StandAlone/ResourceLimits.cpp
index 0765ed1..66e79af 100644
--- a/StandAlone/ResourceLimits.cpp
+++ b/StandAlone/ResourceLimits.cpp
@@ -125,7 +125,6 @@
     /* .MaxCullDistances = */ 8,
     /* .MaxCombinedClipAndCullDistances = */ 8,
     /* .MaxSamples = */ 4,
-#ifdef NV_EXTENSIONS
     /* .maxMeshOutputVerticesNV = */ 256,
     /* .maxMeshOutputPrimitivesNV = */ 512,
     /* .maxMeshWorkGroupSizeX_NV = */ 32,
@@ -135,7 +134,6 @@
     /* .maxTaskWorkGroupSizeY_NV = */ 1,
     /* .maxTaskWorkGroupSizeZ_NV = */ 1,
     /* .maxMeshViewCountNV = */ 4,
-#endif
 
     /* .limits = */ {
         /* .nonInductiveForLoops = */ 1,
diff --git a/glslang/MachineIndependent/Intermediate.cpp b/glslang/MachineIndependent/Intermediate.cpp
index 67bc42d..769dad0 100644
--- a/glslang/MachineIndependent/Intermediate.cpp
+++ b/glslang/MachineIndependent/Intermediate.cpp
@@ -1576,27 +1576,29 @@
                 return false;
             }
         case EbtFloat16:
-            switch (from) {
 #ifdef AMD_EXTENSIONS
+            switch (from) {
             case EbtInt16:
             case EbtUint16:
                 return extensionRequested(E_GL_AMD_gpu_shader_int16);
             case EbtFloat16:
                 return extensionRequested(E_GL_AMD_gpu_shader_half_float);
-#endif
             default:
-                return false;
-        }
+                break;
+            }
+#endif
+            return false;
         case EbtUint16:
-            switch (from) {
 #ifdef AMD_EXTENSIONS
+            switch (from) {
             case EbtInt16:
             case EbtUint16:
                 return extensionRequested(E_GL_AMD_gpu_shader_int16);
-#endif
             default:
-                return false;
-        }
+                break;
+            }
+#endif
+            return false;
         default:
             return false;
         }
diff --git a/glslang/MachineIndependent/ParseHelper.h b/glslang/MachineIndependent/ParseHelper.h
index 0c6b284..b513f49 100644
--- a/glslang/MachineIndependent/ParseHelper.h
+++ b/glslang/MachineIndependent/ParseHelper.h
@@ -348,9 +348,7 @@
     void boolCheck(const TSourceLoc&, const TPublicType&);
     void samplerCheck(const TSourceLoc&, const TType&, const TString& identifier, TIntermTyped* initializer);
     void atomicUintCheck(const TSourceLoc&, const TType&, const TString& identifier);
-#ifdef NV_EXTENSIONS
     void accStructNVCheck(const TSourceLoc & loc, const TType & type, const TString & identifier);
-#endif
     void transparentOpaqueCheck(const TSourceLoc&, const TType&, const TString& identifier);
     void memberQualifierCheck(glslang::TPublicType&);
     void globalQualifierFixCheck(const TSourceLoc&, TQualifier&);
@@ -426,9 +424,8 @@
     // Determine loop control from attributes
     void handleLoopAttributes(const TAttributes& attributes, TIntermNode*);
 
-#ifdef NV_EXTENSIONS
     void resizeMeshViewDimension(const TSourceLoc&, TType&);
-#endif
+
 protected:
     void nonInitConstCheck(const TSourceLoc&, TString& identifier, TType& type);
     void inheritGlobalDefaults(TQualifier& dst) const;