[doc] Add const decorator for FcPatternDuplicate()

diff --git a/doc/fcpattern.fncs b/doc/fcpattern.fncs
index 4e3a7432b648d2c32119e1d655c71bcec642f2b2..95529184e37c643f5b9789e2e876dc3f481f712f 100644 (file)
--- a/doc/fcpattern.fncs
+++ b/doc/fcpattern.fncs
@@ -31,7 +31,7 @@ Creates a pattern with no properties; used to build patterns from scratch.
 
 @RET@          FcPattern *     
 @FUNC@         FcPatternDuplicate
-@TYPE1@                FcPattern *                     @ARG1@           p
+@TYPE1@                const FcPattern *               @ARG1@           p
 @PURPOSE@      Copy a pattern
 @DESC@
 Copy a pattern, returning a new pattern that matches