Fix build with opengl option off

Reported by:	jrm

graphics/jasper/Makefile

@@ -22,7 +22,8 @@ USE_GITHUB=	yes
 
 GH_ACCOUNT=	mdadams
 
-OPENGL_CMAKE_BOOL=	JAS_ENABLE_OPENGL
+OPENGL_CMAKE_OFF=	-DJAS_ENABLE_OPENGL=false
+OPENGL_CMAKE_ON=	-DJAS_ENABLE_OPENGL=true
 OPENGL_USES=		gl xorg
 OPENGL_USE=		GL=glut XORG=x11,xext,xi,xmu
 

graphics/jasper/files/patch-CMakeLists.txt

@@ -0,0 +1,12 @@
+--- CMakeLists.txt.orig	2019-03-12 18:04:35 UTC
++++ CMakeLists.txt
+@@ -267,8 +267,8 @@ message("JAS_HAVE_LIBJPEG: ${JAS_HAVE_LIBJPEG}")
+ # Check for the OpenGL and GLUT libraries.
+ ################################################################################
+ 
+-find_package(OpenGL ${JAS_REQUIRED})
+ message("JAS_ENABLE_OPENGL: ${JAS_ENABLE_OPENGL}")
++find_package(OpenGL ${JAS_OPENGL_REQUIRED})
+ message("OpenGL library found: ${OPENGL_FOUND}")
+ if (JAS_ENABLE_OPENGL AND OPENGL_FOUND)
+ 	set(JAS_HAVE_OPENGL 0)

graphics/jasper/pkg-plist

@@ -28,7 +28,7 @@ libdata/pkgconfig/jasper.pc
 man/man1/imgcmp.1.gz
 man/man1/imginfo.1.gz
 man/man1/jasper.1.gz
-man/man1/jiv.1.gz
+%%OPENGL%%man/man1/jiv.1.gz
 %%PORTDOCS%%%%DOCSDIR%%/README
 %%PORTDOCS%%%%DOCSDIR%%/jasper.pdf
 %%PORTDOCS%%%%DOCSDIR%%/jpeg2000.pdf