Update gps_client.py fix except

gps_client.py

@@ -11,14 +11,14 @@ run this way: python3 example1.py.txt
 import gps               # the gpsd interface module
 import time
 
+mode = -1    
+lat = 0    
+lon = 0    
+alt = 0
+
 try:
     
     session = gps.gps(mode=gps.WATCH_ENABLE)
-
-    mode = -1    
-    lat = 0    
-    lon = 0    
-    alt = 0
     
     start = time.perf_counter()
     
@@ -60,10 +60,8 @@ try:
     
     # Got ^C, or fell out of the loop.  Cleanup, and leave.
     session.close()
-    print("%d %.6f %.6f %.1f" % (mode, lat, lon, alt))
-    exit(0)
-    return
     
-except:
+except:    
-    print("-1 0 0 0")
+    print("%d %.6f %.6f %.1f" % (mode, lat, lon, alt))
     exit(0)
+