Give error messages identifying log file on script errors
(Closes: #122691, #195790, #222050, #306020)

Index: logrotate-3.7.1/logrotate.c
===================================================================
--- logrotate-3.7.1.orig/logrotate.c	2006-04-08 21:03:38.961646055 +0100
+++ logrotate-3.7.1/logrotate.c	2006-04-08 21:05:20.850933782 +0100
@@ -770,8 +770,8 @@
         if (log->pre && !(log->flags & LOG_FLAG_SHAREDSCRIPTS)) {
             message(MESS_DEBUG, "running prerotate script\n");
             if (runScript(log->files[logNum], log->pre)) {
-                message(MESS_ERROR, "error running prerotate script, "
-			"leaving old log in place\n");
+                message(MESS_ERROR, "error running prerotate script for %s, "
+			"leaving old log in place\n", log->files[logNum]);
                 hasErrors = 1;
 	    }
         }
@@ -853,7 +853,8 @@
 	    !(log->flags & LOG_FLAG_SHAREDSCRIPTS)) {
             message(MESS_DEBUG, "running postrotate script\n");
             if (runScript(log->files[logNum], log->post)) {
-                message(MESS_ERROR, "error running postrotate script\n");
+                message(MESS_ERROR, "error running postrotate script for %s\n",
+			log->files[logNum]);
                 hasErrors = 1;
 	    }
         }