Fix problem identified by Ferris McCormick -- we were missing some

out-of-bounds protection for output ID's in some functions.  Also,
move some logic for closing the syslog inside a conditional block --
it's only necessary to close the syslog if we actually closed a
stream.

This commit was SVN r7518.

opal/util/output.c

@@ -251,14 +251,13 @@ void opal_output_close(int output_id)
     /* If it's valid, used, enabled, and has an open file descriptor,
      * free the resources associated with the descriptor */
 
+    OPAL_THREAD_LOCK(&mutex);
     if (output_id >= 0 && output_id < OPAL_OUTPUT_MAX_STREAMS &&
 	info[output_id].ldi_used && info[output_id].ldi_enabled) {
 	free_descriptor(output_id);
-    }
 
         /* If no one has the syslog open, we should close it */
         
-    OPAL_THREAD_LOCK(&mutex);
         for (i = 0; i < OPAL_OUTPUT_MAX_STREAMS; ++i) {
             if (info[i].ldi_used && info[i].ldi_syslog) {
                 break;
@@ -272,6 +271,7 @@ void opal_output_close(int output_id)
 #else
         DeregisterEventSource(info[output_id].ldi_syslog_ident);
 #endif
+    }
 
     /* Somewhat of a hack to free up the temp_str */
 
@@ -290,11 +290,13 @@ void opal_output_close(int output_id)
  */
 void opal_output(int output_id, const char *format, ...)
 {
+    if (output_id >= 0 && output_id < OPAL_OUTPUT_MAX_STREAMS) {
         va_list arglist;
         va_start(arglist, format);
         output(output_id, format, arglist);
         va_end(arglist);
     }
+}
 
 
 /*
@@ -302,7 +304,8 @@ void opal_output(int output_id, const char *format, ...)
  */
 void opal_output_verbose(int level, int output_id, const char *format, ...)
 {
-    if (info[output_id].ldi_verbose_level >= level) {
+    if (output_id >= 0 && output_id < OPAL_OUTPUT_MAX_STREAMS &&
+        info[output_id].ldi_verbose_level >= level) {
 	va_list arglist;
 	va_start(arglist, format);
 	output(output_id, format, arglist);
@@ -316,8 +319,10 @@ void opal_output_verbose(int level, int output_id, const char *format, ...)
  */
 void opal_output_set_verbosity(int output_id, int level)
 {
+    if (output_id >= 0 && output_id < OPAL_OUTPUT_MAX_STREAMS) {
         info[output_id].ldi_verbose_level = level;
     }
+}
 
 
 /*