change log case

Author: YangSen-qn

library/src/androidTest/java/com/qiniu/android/LogUtilsTest.java

@@ -13,7 +13,8 @@ public void testLog(){
 
         Throwable throwable = new Throwable();
 
-        assertTrue(LogUtil.v("log") > 0);
+        int ret = LogUtil.v("log");
+        assertTrue("log ret:" + ret, ret > 0);
         assertTrue(LogUtil.v("v","log") > 0);
         assertTrue(LogUtil.v("v","log", null) > 0);
         assertTrue(LogUtil.v("v","log", throwable) > 0);

library/src/main/java/com/qiniu/android/utils/LogUtil.java

@@ -244,11 +244,11 @@ private static int println(int logLevel, String tag, String msg, Throwable tr) {
                     }
                 }
                 default: {
-                    return -1;
+                    return -10001;
                 }
             }
         } else {
-            return -1;
+            return -10000;
         }
     }