Fixes to make detector geometry function compile

pycrystfel/bindings.pyx

@@ -5,6 +5,6 @@ def progress_bar(val, total, text):
 
 def inspect_geom_file(path):
     cdef crystfel.detector *det
-    det = crystfel.get_detector_geometry(path)
+    det = crystfel.get_detector_geometry(path, NULL)
     print("n_panels:", det.n_panels)
     print("panel names:", [det.panels[i].name for i in range(det.n_panels)])

pycrystfel/crystfel.pxd

@@ -27,13 +27,13 @@ cdef extern from "crystfel/index.h":
     INDEXING_USE_CELL_PARAMETERS
 
 cdef extern from "crystfel/detector.h":
-  ctypedef struct panel:
+  cdef struct panel:
     char name[1024]
     double coffset
     double clen
     # ...
 
-  ctypedef struct detector:
+  cdef struct detector:
     panel *panels
     int n_panels
     # ...