* src/output.c (header_output): Don't forget to export YYLTYPE and

yylloc.
* tests/headers.at (export YYLTYPE): New, make sure it does.
* tests/regression.at (%union and --defines, Invalid CPP headers):
Move to...
* tests/headers.at: here.

tests/testsuite.at

@@ -28,6 +28,7 @@ AT_TESTED([bison])
 m4_include([output.at])
 m4_include([sets.at])
 m4_include([reduce.at])
+m4_include([headers.at])
 m4_include([actions.at])
 m4_include([calc.at])
 m4_include([torture.at])