- Add logic so slave ports can build without installing base plugins.

--- src/filter/CMakeLists.txt.orig	2024-06-07 09:00:56 UTC
+++ src/filter/CMakeLists.txt
@@ -14,6 +14,7 @@ endif (${Cairo_FOUND})
   add_subdirectory (cairogradient)
 endif (${Cairo_FOUND})
 
+if (NOT BUILD_EXTRA_PLUGINS)
 add_subdirectory (3dflippo)
 add_subdirectory (aech0r)
 add_subdirectory (alpha0ps)
@@ -99,3 +100,4 @@ add_subdirectory (vignette)
 add_subdirectory (twolay0r)
 add_subdirectory (vertigo)
 add_subdirectory (vignette)
+endif ()
