Updated exception handling for missing manufacturer/model info in Linux.

gprMax/utilities.py

@@ -216,9 +216,9 @@ def get_host_info():
         try:
             manufacturer = subprocess.check_output("cat /sys/class/dmi/id/sys_vendor", shell=True).decode('utf-8').strip()
             model = subprocess.check_output("cat /sys/class/dmi/id/product_name", shell=True).decode('utf-8').strip()
-        except:
-            pass
         machineID = manufacturer + ' ' + model
+        except subprocess.CalledProcessError:
+            pass
 
         # CPU information
         allcpuinfo = subprocess.check_output("lscpu", shell=True).decode('utf-8').strip()