d3dcompiler: Always expect D3D_COMPILER_VERSION to be defined.

dlls/d3d10/Makefile.in

 MODULE    = d3d10.dll
 IMPORTLIB = d3d10
 IMPORTS   = uuid d3d10core d3dcompiler dxgi
+EXTRADEFS = -DD3D_COMPILER_VERSION=0
 PARENTSRC = ../d3dcompiler_43
 
 EXTRADLLFLAGS = -mno-cygwin

dlls/d3dcompiler_43/reflection.c

@@ -1807,7 +1807,7 @@ err_out:
 }
 
 /* d3d10 reflection methods. */
-#ifndef D3D_COMPILER_VERSION
+#if !D3D_COMPILER_VERSION
 static inline struct d3dcompiler_shader_reflection *impl_from_ID3D10ShaderReflection(ID3D10ShaderReflection *iface)
 {
     return CONTAINING_RECORD(iface, struct d3dcompiler_shader_reflection, ID3D10ShaderReflection_iface);

dlls/d3dcompiler_43/utils.c

@@ -758,7 +758,7 @@ void compilation_message(struct compilation_messages *msg, const char *fmt, __ms
     }
 }
 
-#ifdef D3D_COMPILER_VERSION
+#if D3D_COMPILER_VERSION
 BOOL add_declaration(struct hlsl_scope *scope, struct hlsl_ir_var *decl, BOOL local_var)
 {
     struct hlsl_ir_var *var;