changed AP_CPPFLAGS to AM_CPPFLAGS in PyImathNumpy/Makefile.am.
What this a typo? The automake-generated Makefiles expect 'AM', which
was leading to a failure to find PyImath.h.
@@ -13,7 +13,7 @@ imathnumpymodule_la_LIBADD = $(top_builddir)/PyImath/libPyImath.la @BOOST_PYTHO
noinst_HEADERS =
-AP_CPPFLAGS = @ILMBASE_CXXFLAGS@ \
+AM_CPPFLAGS = @ILMBASE_CXXFLAGS@ \
@NUMPY_CXXFLAGS@ \
-I$(top_srcdir)/PyImath \
-I$(top_builddir) \
