[gimp] configure.ac: fix check for freetype2

[Michael Natterer <mitch src gnome org>]

commit 7c1ea0345ef2d7c47824204990597c46eb2e1b16
Author: Michael Natterer <mitch gimp org>
Date:   Thu Mar 29 12:25:27 2018 +0200

    configure.ac: fix check for freetype2

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index dbeb85a..8bf725f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -863,7 +863,7 @@ if test "x$fontconfig_ok" = xno; then
 fi
 
 
-PKG_CHECK_MODULES(FONTCONFIG, freetype2 >= freetype2_required_version,,
+PKG_CHECK_MODULES(FREETYPE, freetype2 >= freetype2_required_version,,
                   [add_deps_error([freetype2_required_version >= freetype2_required_version])])
 
 PKG_CHECK_MODULES(HARFBUZZ, harfbuzz >= harfbuzz_required_version,,