Fix pyfaust.Faust functions that use FaustCoreGPU pyx type unconditionally (it...

Fix pyfaust.Faust functions that use FaustCoreGPU pyx type unconditionally (it makes the wrapper to crash if not compiled with GPU support) and remove an erroneous use of FaustCoreGPU type in pure CPU pyx FaustCore class (in multiply function).

wrapper/python/pyfaust.py

@@ -238,11 +238,7 @@ class Faust:
         """
         Returns the device on which the Faust is located (cpu or gpu).
         """
-        if(isinstance(self.m_faust, (_FaustCorePy.FaustCoreGPU,
-                      _FaustCorePy.FaustCore))):
-            return self.m_faust.device()
-        else:
-            raise TypeError('This Faust object is invalid.')
+        return self.m_faust.device()
 
     def transpose(F):
         """
@@ -502,9 +498,7 @@ class Faust:
 
         See also Faust.__sub__
         """
-        dev = 'cpu'
-        if isinstance(F.m_faust, _FaustCorePy.FaustCoreGPU):
-            dev = 'gpu'
+        dev = F.device
         for i in range(0,len(args)):
             G = args[i]
             if(isinstance(G,Faust)):
@@ -1774,7 +1768,7 @@ class Faust:
         Returns:
             The Faust clone.
         """
-        if isinstance(F.m_faust, _FaustCorePy.FaustCoreGPU):
+        if F.device == 'gpu':
              clone_F = Faust(core_obj=F.m_faust.clone(dev))
              return clone_F
         else:

wrapper/python/src/_FaustCorePy.pyx

@@ -431,7 +431,7 @@ cdef class FaustCore:
     # Left-Multiplication by a Faust F
     # y=multiply(F,M) is equivalent to y=F*M
     def multiply(self,M):
-        if(isinstance(M, (FaustCore, FaustCoreGPU))):
+        if isinstance(M, FaustCore):
             return self.multiply_faust(M)
         if not isinstance(M, np.ndarray):
             raise ValueError('input M must be a numpy.ndarray')