Ignore __restrict when generation documentation.
I can't find any other workaround for this.
@@ -2129,6 +2129,7 @@ PREDEFINED = TCODLIB_API= \
TCOD_NODISCARD= \
TCOD_PUBLIC= \
TCOD_PRIVATE= \
+ __restrict= \
__cplusplus
# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
