if --with-foo=<path> is specific for a configure option, ensure that it is used for header file checking as well

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@49712 65c4cc65-6c06-0410-ace0-fbb531ad65f3

acinclude.m4

@@ -59,11 +59,11 @@ if test "${USE_$1}" != "no"; then
          $1_LIB="${pbxlibdir} ${$1_LIB}"
 	 $1_INCLUDE="-I${$1_DIR}/include"
 	 if test "x$4" != "x" ; then
-	    AC_CHECK_HEADER([${$1_DIR}/include/$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0] )
+	    AC_CHECK_HEADER([${$1_DIR}/include/$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0], -I${$1_DIR}/include)
 	 fi
       else
 	 if test "x$4" != "x" ; then
-            AC_CHECK_HEADER([$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0] )
+            AC_CHECK_HEADER([$4], [$1_HEADER_FOUND=1], [$1_HEADER_FOUND=0])
 	 fi
       fi
       if test "x${$1_HEADER_FOUND}" = "x0" ; then