fix compile error

paddle/gserver/layers/MKLPackedGemm.h

@@ -27,7 +27,7 @@ protected:
   size_t weightWidth_;
 
 public:
-  MKLPackedGemm(MatrixPtr weight) {
+  explicit MKLPackedGemm(MatrixPtr weight) {
     weightHeight_ = weight->getHeight();
     weightWidth_ = weight->getWidth();
     weightPacked_ =
@@ -91,4 +91,5 @@ public:
     cblas_sgemm_free(weightTPacked_);
   }
 };
+
 }  // namespace paddle

paddle/gserver/layers/MKLPackedRecurrentLayer.h

@@ -12,6 +12,8 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
+#pragma once
+
 #include <gflags/gflags.h>
 #include "Layer.h"
 #include "MKLPackedGemm.h"
@@ -128,4 +130,5 @@ protected:
 
   std::unique_ptr<MKLPackedGemm> sgemm_packed_;
 };
-}
+
+}  // namespace paddle