[MINOR] stats: correctly report errors on "show table" and "clear table"

"show table XXX" did not report that the table did not exist, and
errors produced by "clear table" missed the trailing "\n".
diff --git a/src/dumpstats.c b/src/dumpstats.c
index 44bde41..836d20d 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -381,8 +381,14 @@
 		}
 		else if (strcmp(args[1], "table") == 0) {
 			s->data_state = DATA_ST_INIT;
-			if (*args[2])
-				s->data_ctx.table.target = findproxy(args[2], 0);
+			if (*args[2]) {
+				s->data_ctx.table.target = find_stktable(args[2]);
+				if (!s->data_ctx.table.target) {
+					s->data_ctx.cli.msg = "No such table\n";
+					si->st0 = STAT_CLI_PRINT;
+					return 1;
+				}
+			}
 			else
 				s->data_ctx.table.target = NULL;
 			s->data_ctx.table.proxy = NULL;
@@ -450,7 +456,7 @@
 			unsigned int ip_key;
 
 			if (!*args[2]) {
-				s->data_ctx.cli.msg = "\"table\" argument expected.";
+				s->data_ctx.cli.msg = "\"table\" argument expected\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}
@@ -458,19 +464,19 @@
 			px = find_stktable(args[2]);
 
 			if (!px) {
-				s->data_ctx.cli.msg = "No such table.";
+				s->data_ctx.cli.msg = "No such table\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}
 
 			if (strcmp(args[3], "key") != 0) {
-				s->data_ctx.cli.msg = "\"key\" argument expected.";
+				s->data_ctx.cli.msg = "\"key\" argument expected\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}
 
 			if (!*args[4]) {
-				s->data_ctx.cli.msg = "Key value expected.";
+				s->data_ctx.cli.msg = "Key value expected\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}
@@ -480,7 +486,7 @@
 				static_table_key.key = (void *)&ip_key;
 			}
 			else {
-				s->data_ctx.cli.msg = "Removing keys from non-ip tables is not supported.";
+				s->data_ctx.cli.msg = "Removing keys from non-ip tables is not supported\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}
@@ -499,7 +505,7 @@
 			}
 			else if (ts->ref_cnt) {
 				/* don't delete an entry which is currently referenced */
-				s->data_ctx.cli.msg = "Entry currently in use, cannot remove.";
+				s->data_ctx.cli.msg = "Entry currently in use, cannot remove\n";
 				si->st0 = STAT_CLI_PRINT;
 				return 1;
 			}