Make some private variables static (oops)

This commit was SVN r499.

src/lam/util/output.c

@@ -25,9 +25,9 @@
 /*
  * Private data
  */
-int verbose_stream = -1;
+static int verbose_stream = -1;
-int verbose_level = 0;
+static int verbose_level = 0;
-lam_output_stream_t verbose = {
+static lam_output_stream_t verbose = {
   /* debugging */
   false,
   /* verbose level */