[JNI] Fixed a Linux-related issue.

Author: eaplatanios

api/src/main/scala/org/platanios/tensorflow/api/core/client/Session.scala

@@ -120,6 +120,7 @@ class Session private[api](
       (implicit executable: Executable[E], fetchable: Fetchable.Aux[F, R]): (R, Option[RunMetadata]) = {
     if (nativeHandle == 0)
       throw new IllegalStateException("This session has already been closed.")
+    // TODO: !!! [JNI] Add a call to 'extend' once some JNI issues are resolved.
     val (inputs, inputTensors) = feeds.values.toSeq.unzip
     val inputTensorHandles: Array[Long] = inputTensors.map(_.resolve()).toArray
     val inputOpHandles: Array[Long] = inputs.map(_.op.nativeHandle).toArray

jni/src/main/native/include/tensorflow/c/python_api.cc

@@ -17,7 +17,6 @@ limitations under the License.
 
 #include "c_api.h"
 #include "c_api_internal.h"
-//#include "tensorflow/core/graph/validate.h"
 
 namespace tensorflow {
 
@@ -118,7 +117,7 @@ void SetAttr(
 void ExtendSession(TF_Session* session, TF_Status* status) {
   // TODO: !!! [JNI] Fix this.
   // ExtendSessionGraphHelper(session, status);
-  session->extend_before_run = false;
+  // session->extend_before_run = false;
 }
 
 //// TODO(josh11b,mrry): Change Session to be able to use a Graph*