javaee-api-api/issue55 NullPointerException is thrown if application doesn't include precompiled classes.

Author: ruolli

impl/src/main/java/org/apache/jasper/JspCompilationContext.java

@@ -602,7 +602,9 @@ public boolean keepGenerated() {
 
     public void incrementRemoved() {
         if (removed > 1) {
-            jspCompiler.removeGeneratedFiles();
+            if(jspCompiler != null) { 
+                jspCompiler.removeGeneratedFiles();
+            }
             if( rctxt != null )
                 rctxt.removeWrapper(jspUri);
         }