[BUGFIX] Trick to avoid a lot of IllegalStateException

src/main/java/net/sourceforge/plantuml/servlet/DiagramResponse.java

@@ -64,7 +64,7 @@ class DiagramResponse {
         }
         response.setContentType(getContentType());
         SourceStringReader reader = new SourceStringReader(uml);
-        reader.generateImage(response.getOutputStream(), new FileFormatOption(format));
+        reader.generateImage(response.getOutputStream(), new FileFormatOption(format, false));
     }
     
     void sendMap(String uml) throws IOException {
@@ -73,7 +73,7 @@ class DiagramResponse {
         }
         response.setContentType(getContentType());
         SourceStringReader reader = new SourceStringReader(uml);
-        String map = reader.generateImage(new NullOutputStream(), new FileFormatOption(FileFormat.PNG));
+        String map = reader.generateImage(new NullOutputStream(), new FileFormatOption(FileFormat.PNG, false));
         String[] mapLines = map.split("[\\r\\n]");
         PrintWriter httpOut = response.getWriter();
         for (int i=2; (i+1)<mapLines.length; i++) {

src/main/java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java

@@ -164,7 +164,7 @@ public class PlantUmlServlet extends HttpServlet {
         }
         response.setContentType("image/png");
         SourceStringReader reader = new SourceStringReader(uml);
-        reader.generateImage(response.getOutputStream(), new FileFormatOption(FileFormat.PNG));
+        reader.generateImage(response.getOutputStream(), new FileFormatOption(FileFormat.PNG, false));
     }
 
 }

src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java

@@ -80,7 +80,7 @@ public class ProxyServlet extends HttpServlet {
         SourceStringReader reader = new SourceStringReader(getSource(source));
         int n = num == null ? 0 : Integer.parseInt(num);
 
-        reader.generateImage(response.getOutputStream(), n, new FileFormatOption(getOutputFormat()));
+        reader.generateImage(response.getOutputStream(), n, new FileFormatOption(getOutputFormat(), false));
     }
 
     private String getSource(String uri) throws IOException {