java-decompiler: do not indent log by unprinted messages

src/org/jetbrains/java/decompiler/main/decompiler/PrintStreamLogger.java

@@ -39,56 +39,72 @@ public class PrintStreamLogger extends IFernflowerLogger {
 
   @Override
   public void writeMessage(String message, Throwable t) {
-    writeMessage(message, Severity.ERROR);
     if (accepts(Severity.ERROR)) {
+      writeMessage(message, Severity.ERROR);
       t.printStackTrace(stream);
     }
   }
 
   @Override
   public void startReadingClass(String className) {
+    if (accepts(Severity.INFO)) {
       writeMessage("Decompiling class " + className, Severity.INFO);
       ++indent;
     }
+  }
 
   @Override
   public void endReadingClass() {
+    if (accepts(Severity.INFO)) {
       --indent;
       writeMessage("... done", Severity.INFO);
     }
+  }
 
   @Override
   public void startClass(String className) {
+    if (accepts(Severity.INFO)) {
       writeMessage("Processing class " + className, Severity.TRACE);
       ++indent;
     }
+  }
 
   @Override
   public void endClass() {
+    if (accepts(Severity.INFO)) {
       --indent;
       writeMessage("... proceeded", Severity.TRACE);
     }
+  }
 
   @Override
   public void startMethod(String methodName) {
+    if (accepts(Severity.INFO)) {
       writeMessage("Processing method " + methodName, Severity.TRACE);
       ++indent;
     }
+  }
 
   public void endMethod() {
+    if (accepts(Severity.INFO)) {
       --indent;
       writeMessage("... proceeded", Severity.TRACE);
     }
+  }
 
   @Override
   public void startWriteClass(String className) {
+    if (accepts(Severity.INFO)) {
       writeMessage("Writing class " + className, Severity.TRACE);
       ++indent;
     }
+  }
 
   @Override
   public void endWriteClass() {
+    if (accepts(Severity.INFO)) {
       --indent;
       writeMessage("... written", Severity.TRACE);
     }
+  }
 }