* unix/configure.raw: We need 'librsvg' version 2.46.0 or newer.

Older versions don't have function `rsvg_handle_get_intrinsic_dimensions`.
diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw
index e9eb0ee..f84dcec 100644
--- a/builds/unix/configure.raw
+++ b/builds/unix/configure.raw
@@ -531,7 +531,7 @@
                 || LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
 
 # 'librsvg' is needed to demonstrate SVG support.
-PKG_CHECK_MODULES([LIBRSVG], [librsvg-2.0],
+PKG_CHECK_MODULES([LIBRSVG], [librsvg-2.0 >= 2.46.0],
                   [have_librsvg="yes (pkg-config)"], [have_librsvg=no])
 
 FT_DEMO_CFLAGS=""