#1297 Only generate the ino file once per build

I don't know why all files are given for a build
This way sloeber.ino.cpp is always build

Author: jantje

io.sloeber.core/src/io/sloeber/core/builder/inoToCpp.java

@@ -15,6 +15,7 @@
 public class inoToCpp extends IncrementalProjectBuilder {
 
     class SampleDeltaVisitor implements IResourceDeltaVisitor {
+        private boolean inoFileProcessed = false;
         /*
          * (non-Javadoc)
          *
@@ -23,6 +24,9 @@ class SampleDeltaVisitor implements IResourceDeltaVisitor {
          */
         @Override
         public boolean visit(IResourceDelta delta) throws CoreException {
+            if (inoFileProcessed) {
+                return false;
+            }
             IResource resource = delta.getResource();
             if (resource.getFileExtension() != null) {
                 if (resource.getFileExtension().equalsIgnoreCase("ino") //$NON-NLS-1$
@@ -32,6 +36,7 @@ public boolean visit(IResourceDelta delta) throws CoreException {
                     } catch (CoreException e) {
                         e.printStackTrace();
                     }
+                    inoFileProcessed = true;
                     return false;
                 }
             }