rrdtool check: no need to save CPPFLAGS

There's no need to save CPPFLAGS when we're just
checking a library.

diff --git a/configure.ac b/configure.ac
index 23a3efd..fc2c6aa 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -4114,10 +4114,7 @@ then
 fi
 if test "x$with_librrd" = "xyes"
 then
-       SAVE_CPPFLAGS="$CPPFLAGS"
        SAVE_LDFLAGS="$LDFLAGS"
-
-       CPPFLAGS="$CPPFLAGS $librrd_cflags"
        LDFLAGS="$LDFLAGS $librrd_ldflags"
 
        AC_CHECK_LIB(rrd_th, rrd_update_r,
@@ -4141,7 +4138,6 @@ then
                AC_CHECK_LIB(rrd, rrdc_update, [librrd_rrdc_update="yes"], [librrd_rrdc_update="no"])
        fi
 
-       CPPFLAGS="$SAVE_CPPFLAGS"
        LDFLAGS="$SAVE_LDFLAGS"
 fi
 if test "x$with_librrd" = "xyes"