doxygen: dont strip code comments

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/Doxyfile

@@ -709,7 +709,7 @@ INLINE_SOURCES         = NO
 # doxygen to hide any special comment blocks from generated source code
 # fragments. Normal C and C++ comments will always remain visible.
 
-STRIP_CODE_COMMENTS    = YES
+STRIP_CODE_COMMENTS    = NO
 
 # If the REFERENCED_BY_RELATION tag is set to YES
 # then for each documented function all documented