Normalize macro usage

Author: sethrj

include/flc_vector.i

@@ -15,7 +15,7 @@
  * Macro definitions
  * ------------------------------------------------------------------------- */
 
-%define EXTEND_STD_VECTOR_POD(CTYPE)
+%define %flc_extend_vector_pod(CTYPE)
   %apply (const SWIGTYPE *DATA, ::size_t SIZE)
     { (const CTYPE* DATA, size_type SIZE) };
 
@@ -50,6 +50,9 @@
  * These provide an efficient constructor from a Fortan array view. It also
  * offers a "view" functionality for getting an array pointer to the
  * vector-owned data.
+ *
+ * This definition is considered part of the \em public API so that downstream
+ * apps that generate FLC-based bindings can instantiate their own POD vectors.
  */
 %define %specialize_std_vector_pod(T)
 
@@ -62,7 +65,7 @@ namespace std {
     SWIG_STD_VECTOR_COMMON(T, const T&)
     SWIG_STD_VECTOR_REF(T)
     %extend {
-      EXTEND_STD_VECTOR_POD(T)
+      %flc_extend_vector_pod(T)
     }
   };
 }