FIX: Compilation fixed

src/connection_m_mem_leak_test.f90

@@ -2,6 +2,7 @@ program connection_mem_leak_test
     use connection_m
     use neuron_m
     use normal_m
+    use data_kinds_4neuro_m
 
     type(mock_neuron_t), pointer         :: n1_p
     type(mock_neuron_t), pointer         :: n2_p
@@ -20,7 +21,7 @@ program connection_mem_leak_test
     con2 => connection_t(input_neuron=n1_p, output_neuron=n2_p)
 
     print *, 'Creating an instance of the class interval_connection_t with 3-parameters constructor...'
-    con1 => connection_t(input_neuron=n1_p, output_neuron=n2_p, weight=5.25)
+    con1 => connection_t(input_neuron=n1_p, output_neuron=n2_p, weight=real(5.25, real_4neuro))
 
     deallocate(con1)
     deallocate(con2)