- Value pointed to is not modified (file-name / FILE-macro),

getting rid of compiler-warning when compiled with trunk of g++:
   when doing --enable-debug:
  ../../../../orte/class/orte_pointer_array.h:128: warning: deprecated
  conversion from string constant to 'char*'

This commit was SVN r16656.

opal/threads/mutex_unix.h

@@ -60,7 +60,7 @@ struct opal_mutex_t {
 
 #if !OMPI_HAVE_THREAD_SUPPORT && OMPI_ENABLE_DEBUG
     int m_lock_debug;
-    char *m_lock_file;
+    const char *m_lock_file;
     int m_lock_line;
 #endif
 

opal/threads/mutex_windows.h

@@ -42,7 +42,7 @@ struct opal_mutex_t {
 
 #if !OMPI_HAVE_THREAD_SUPPORT && OMPI_ENABLE_DEBUG
     int m_lock_debug;
-    char *m_lock_file;
+    const char *m_lock_file;
     int m_lock_line;
 #endif
 };