configure: The libtiff pkg-config name is libtiff-4.

[Francois Gouget]

Signed-off-by: Francois Gouget <fgouget at codeweavers.com>
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Checked on Debian 7, Debian Testing, Fedora 19 and OpenSUSE 13.1.
The funny thing is libtiff.so.4 is TIFF 3.x, and libtiff.so.5 is TIFF 
4.x.

diff --git a/configure.ac b/configure.ac
index 457ede0..1606582 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1716,7 +1716,7 @@ WINE_WARNING_WITH(png,[test "x$ac_cv_lib_soname_png" = "x"],
 dnl **** Check for libtiff ****
 if test "x$with_tiff" != "xno"
 then
-    WINE_PACKAGE_FLAGS(TIFF,[libtiff],,,,
+    WINE_PACKAGE_FLAGS(TIFF,[libtiff-4],,,,
         [AC_CHECK_HEADERS([tiffio.h])
         if test "$ac_cv_header_tiffio_h" = "yes"
         then
-- 
2.6.1