[xml] [PATCH] configure: fix enabling of lzma support when pkg-config is available

["Dmitry V. Levin" <ldv altlinux org>]

When pkg-config says that liblzma is available, the check for lzma.h
is still necessary because HAVE_LZMA_H is still used by the code.

This fixes regression introduced by commit
v2.9.1-37-gf3f86ff465c92c79f834d7b981f3c7274a8bb5c8.
---
 configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/configure.ac b/configure.ac
index 14ac0a8..c32777a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -434,22 +434,30 @@ else
      if test "x$have_liblzma" = "xno"; then
          AC_CHECK_HEADERS(lzma.h,
            [SAVE_LDFLAGS="${LDFLAGS}"
             LDFLAGS="-L${LZMA_DIR}/lib"
             AC_CHECK_LIB(lzma, lzma_code,[
                 have_liblzma=yes
                 if test "x${LZMA_DIR}" != "x"; then
                     LZMA_CFLAGS="-I${LZMA_DIR}/include"
                     LZMA_LIBS="-L${LZMA_DIR}/lib -llzma"
                 else
                     LZMA_LIBS="-llzma"
                 fi],
                 [have_liblzma=no])
             LDFLAGS="${SAVE_LDFLAGS}"])
+    else
+        SAVE_CFLAGS="${CFLAGS}"
+        CFLAGS="${CFLAGS} ${LZMA_CFLAGS}"
+        AC_CHECK_HEADERS([lzma.h],, [
+            have_liblzma=no
+            LZMA_CFLAGS=
+            LZMA_LIBS=])
+        CFLAGS="${SAVE_CFLAGS}"
     fi
 
     # Found the library via either method?
     if test "x$have_liblzma" = "xyes"; then
         AC_DEFINE([HAVE_LIBLZMA], [1], [Have compression library])
         WITH_LZMA=1
     fi
 fi

-- 
ldv