Set empty map for bad regions

pycrystfel/bindings.pyx

 import os
 
+from libc.stdlib cimport malloc, free
 cimport numpy as cnp
 
 from . cimport crystfel
@@ -22,7 +23,9 @@ def find_peaks_single_panel(cnp.ndarray[cnp.npy_float, ndim=2] data, str geom_fi
         crystfel.image image
 
     image.dp[0] = <float*>data.data
+    image.bad[0] = <int*>malloc(data.size * sizeof(int))
     image.det = crystfel.get_detector_geometry(os.fsencode(geom_file), &beam)
+    print(f"Loaded geometry with {image.det.n_panels} panels")
 
     crystfel.search_peaks_peakfinder8(
         &image, max_n_peaks=200, threshold=20, min_snr=3, min_pix_count=2,