fixed-point: added a celt_ener_t type for band energy.
diff --git a/libcelt/arch.h b/libcelt/arch.h
index e954c70..49915e5 100644
--- a/libcelt/arch.h
+++ b/libcelt/arch.h
@@ -53,6 +53,7 @@
 
 typedef celt_word32_t celt_sig_t;
 typedef celt_word16_t celt_norm_t;
+typedef float celt_ener_t;
 
 #define Q15ONE 32767
 
@@ -102,6 +103,7 @@
 
 typedef float celt_sig_t;
 typedef float celt_norm_t;
+typedef float celt_ener_t;
 
 #define Q15ONE 1.0f
 #define LPC_SCALING  1.f