Fix gps error counter so that it is meaningful, it was being reset each

time the gps unit was reinitialised leading users to think there were no
GPS errors.

src/main/io/display.c

@@ -321,6 +321,11 @@ void showGpsPage() {
     padLineBuffer();
     i2c_OLED_set_line(rowIndex++);
     i2c_OLED_send_string(lineBuffer);
+
+    tfp_sprintf(lineBuffer, "%d cm/s, gc: %d", GPS_speed, GPS_ground_course);
+    padLineBuffer();
+    i2c_OLED_set_line(rowIndex++);
+    i2c_OLED_send_string(lineBuffer);
 }
 
 void showBatteryPage(void)

src/main/io/gps.c

@@ -179,6 +179,9 @@ void gpsInit(serialConfig_t *initialSerialConfig, gpsConfig_t *initialGpsConfig)
         }
     }
 
+    // clear error counter
+    gpsData.errors = 0;
+
     gpsConfig = initialGpsConfig;
 
     // init gpsData structure. if we're not actually enabled, don't bother doing anything else
@@ -297,9 +300,6 @@ void gpsInitHardware(void)
             gpsInitUblox();
             break;
     }
-
-    // clear error counter
-    gpsData.errors = 0;
 }
 
 void gpsThread(void)