shader: complete faulting SRT walker loads as zero reads

src/loader/x64InstructionEmulator.cpp

@@ -822,4 +822,10 @@ bool TryEmulate(void* native_context) {
 	       TryEmulateCpuExtensions(context);
 }
 
+void SkipLoad(void* native_context, size_t length) {
+	Context context {static_cast<decltype(Context::native)>(native_context)};
+	context.Gpr(0) = 0;
+	context.Advance(length);
+}
+
 } // namespace Loader::X64InstructionEmulator