[wip/histodet] Fix issues in the handling of demo option

// is not understand properly by gmake, use the right comment character.
In depend.mk, don't search for the demo file, which won't be here if you
did not build the package with demo option.

histodet/Makefile

@@ -7,7 +7,7 @@ VERSION=		1.0
 CATEGORIES=		image
 MASTER_SITES=		${MASTER_SITE_OPENROBOTS:=histodet/}
 MASTER_REPOSITORY=	${MASTER_REPOSITORY_OPENROBOTS_TRAC}histodet
-PKGREVISION= 	1
+PKGREVISION= 	2
 
 MAINTAINER=		robotpkg@laas.fr
 COMMENT=		Fast object detector based on histogram
@@ -17,7 +17,7 @@ PKG_SUPPORTED_OPTIONS+=	demo
 PKG_OPTION_DESCR.demo?=	Install demo histodet tool, including the learning tool
 define PKG_OPTION_SET.demo
 	CMAKE_ARGS+=		-DBUILD_DEMO=ON
-	// requiere opencv_highgui
+#	requiere opencv_highgui
 endef
 define PKG_OPTION_UNSET.demo
   	CMAKE_ARGS+=		-DBUILD_DEMO=OFF

histodet/depend.mk

@@ -18,7 +18,6 @@ DEPEND_ABI.histodet?=	histodet>=1.0
 DEPEND_DIR.histodet?=	../../wip/histodet
 
 SYSTEM_SEARCH.histodet=\
-	bin/histodet_demo \
 	include/histodet/hsv.hpp \
 	lib/libhistodet.so \
 	'lib/pkgconfig/histodet.pc:/Version/s/[^0-9.]//gp'