Fix include issue with older Meson versions, see #131

meson.build

@@ -80,6 +80,8 @@ if get_option('standalone')
 		language: 'c')
 endif
 
+glava_headers = include_directories('glava')
+
 add_project_arguments(
 	'-DGLAVA_VERSION="'+glava_version+'"',
 	'-DSHADER_INSTALL_PATH="'+shaderdir+'/glava"',
@@ -99,7 +101,7 @@ executable(
     'glava',
     sources: run_command('find', 'glava-cli', '-type', 'f', '-name', '*.c', '-print').stdout().strip().split('\n'),
     link_with: libglava,
-    include_directories: 'glava',
+    include_directories: glava_headers,
     install: true
 )