Fix some issues related to python scripts:

- make PadArray.py compatible python2/3
- fix a wxWidgets warning in pcbnew_scripting_helpers.cpp shown in some cases

pcbnew/python/plugins/PadArray.py

@@ -212,7 +212,11 @@ class PadGridArray(PadArray):
         @param py: pitch in y-direction
         @param centre: array centre point
         """
-        super(PadGridArray, self).__init__(pad)
+
+        try:
+            super().__init__(pad)
+        except TypeError:
+            super(PadGridArray, self).__init__(pad)
 
         self.nx = int(nx)
         self.ny = int(ny)

pcbnew/swig/pcbnew_scripting_helpers.cpp

@@ -45,6 +45,8 @@
 #include <settings/settings_manager.h>
 #include <project/project_local_settings.h>
 #include <wildcards_and_files_ext.h>
+#include <locale_io.h>
+
 
 static PCB_EDIT_FRAME* s_PcbEditFrame = NULL;
 
@@ -124,6 +126,10 @@ BOARD* LoadBoard( wxString& aFileName, IO_MGR::PCB_FILE_T aFormat )
     pro.MakeAbsolute();
     wxString projectPath = pro.GetFullPath();
 
+    // Ensure the "C" locale is temporary set, before reading any file
+    // It also avoid wxWidget alerts about locale issues, later, when using Python 3
+    LOCALE_IO dummy;
+
     PROJECT* project = GetSettingsManager()->GetProject( projectPath );
 
     if( !project )