Fix warning in Sphinx build up

Roberto Di Remigio · Roberto Di Remigio · commit b34928f9179c · 2016-04-08T10:47:09.000+02:00
diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
@@ -752,6 +752,7 @@ WARN_LOGFILE           =
 
 INPUT                  = @PROJECT_SOURCE_DIR@/src \
                          @PROJECT_SOURCE_DIR@/api \
+                         @PROJECT_SOURCE_DIR@/include \
                          @PROJECT_SOURCE_DIR@/doc
 
 # This tag can be used to specify the character encoding of the source files
