Bug 711047, followup to part 2: use C-style comment in nsError.h, to fix build warnings for its inclusion in .c files. rs=sicking

xpcom/base/nsError.h

@@ -87,7 +87,7 @@
 #define NS_ERROR_MODULE_LDAP       20
 #define NS_ERROR_MODULE_SECURITY   21
 #define NS_ERROR_MODULE_DOM_XPATH  22
-// 23 used to be NS_ERROR_MODULE_DOM_RANGE (see bug 711047)
+/* 23 used to be NS_ERROR_MODULE_DOM_RANGE (see bug 711047) */
 #define NS_ERROR_MODULE_URILOADER  24
 #define NS_ERROR_MODULE_CONTENT    25
 #define NS_ERROR_MODULE_PYXPCOM    26