fix s57 paths, add grib download error logging

Author: dakk

gweatherrouting/gtk/charts/vectordrawer/s57symbolprovider.py

@@ -54,7 +54,7 @@ def __init__(self, settingsManager):
 
         # Try to load cached data
         try:
-            with open(DATA_DIR + "s57_symbols.json", "r") as f:
+            with open(DATA_DIR + "/s57_symbols.json", "r") as f:
                 self.symbols = json.load(f)
                 logger.debug("Loaded cached S57 symbols")
                 return
@@ -99,7 +99,7 @@ def __init__(self, settingsManager):
             except:
                 continue
 
-        with open(DATA_DIR + "s57_symbols.json", "w") as f:
+        with open(DATA_DIR + "/s57_symbols.json", "w") as f:
             json.dump(self.symbols, f)
             f.close()
             logger.debug("Saved cached S57 symbols")

gweatherrouting/gtk/gribmanagerwindow.py

@@ -78,9 +78,9 @@ def downloadList(self):
                 self.gribFilesStore.append(x)
                 Gdk.threads_leave()
             Gdk.threads_enter()
-        except:
+        except Exception as e:
             Gdk.threads_enter()
-            logger.error("Failed to download grib file list")
+            logger.error(f"Failed to download grib file list: {str(e)}")
             self.builder.get_object("download-progress").set_text(
                 "Failed to download grib list"
             )