Use float32 instead of float in test_genereric_projection

tests/test_projection.py

@@ -43,7 +43,7 @@ def test_genereric_projection():
     volume = pystencils.fields('volume: float32[3d]')
     projections = pystencils.fields('projections: float32[2D]')
 
-    projection_matrix = pystencils_reco.matrix_symbols('T', pystencils.data_types.create_type('float'), 3, 4)
+    projection_matrix = pystencils_reco.matrix_symbols('T', pystencils.data_types.create_type('float32'), 3, 4)
 
     assignments = forward_projection(volume, projections, projection_matrix)
     print(assignments)