fix gain=0

Author: cx1111

setup.py

@@ -20,7 +20,7 @@
     # Versions should comply with PEP440. For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='1.0.1',
+    version='1.0.2',
 
     description='The WFDB Python Toolbox',
     long_description=long_description,

wfdb/_headers.py

@@ -481,7 +481,9 @@ def read_sig_lines(siglines):
                     d_sig[field][i] = int(d_sig[field][i])
                 elif sigfieldspecs[field].allowedtypes is floattypes:
                     d_sig[field][i] = float(d_sig[field][i])
-                
+                    # Special case: gain of 0 means 200
+                    if field == 'adcgain' and d_sig['adcgain'][i] == 0:
+                        d_sig['adcgain'][i] = 200
 
     return d_sig