Enable automatic bsxfun for power operators * bsxfun.h: Put #include guards * int8NDArray.cc: Define bsxfun power operator for integral types. * int16NDArray.cc: Ditto. * int32NDArray.cc: Ditto. * int64NDArray.cc: fDitto. * uint8ADArray.cc: Ditto. * uint16NDArray.cc: Ditto. * uint32NDArray.cc: Ditto. * uint64NDArray.cc: Ditto. * mx-inlines.cc: Let the compiler decide to use Octave's own integral pow. * op-int.h: Call bsxfun for integral operators. * xpow.cc: Call bsxfun for float operators.

--- a/liboctave/bsxfun.h
+++ b/liboctave/bsxfun.h
@@ -19,6 +19,8 @@
 <http://www.gnu.org/licenses/>.
 
 */
+#if !defined (bsxfun_h)
+#define bsxfun_h 1
 
 #include <algorithm>
 
@@ -38,3 +40,5 @@
     }
   return true;
 }
+
+#endif