Ignore macro which confuses Doxygen.

Doxyfile

@@ -2000,7 +2000,8 @@ INCLUDE_FILE_PATTERNS  =
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 PREDEFINED             = DOXYGEN_GENERATING_OUTPUT \
-    MAGNUM_BUILD_DEPRECATED CORRADE_DEPRECATED(message)= \
+    CORRADE_DEPRECATED(message)= CORRADE_DEPRECATED_ENUM(message)= \
+    MAGNUM_BUILD_DEPRECATED \
     MAGNUM_EXPORT= \
     MAGNUM_AUDIO_EXPORT= \
     MAGNUM_DEBUGTOOLS_EXPORT= \