Fix _parseCSV() array index bug: lon and ele always returned lat value

In _parseCSV(), all three location fields (lat, lon, ele) were reading from fields[1], meaning lon and ele always returned the latitude value instead of their own data. Also removes an unreachable return statement at the end of the function.

Author: mikeysklar

src/AdafruitIO_Data.cpp

@@ -890,12 +890,12 @@ bool AdafruitIO_Data::_parseCSV() {
     }
 
     if (field_count > 0) {
-      _lon = atof(fields[1]);
+      _lon = atof(fields[2]);
       field_count--;
     }
 
     if (field_count > 0) {
-      _ele = atof(fields[1]);
+      _ele = atof(fields[3]);
       field_count--;
     }
 
@@ -911,5 +911,4 @@ bool AdafruitIO_Data::_parseCSV() {
     return false;
   }
 
-  return true;
 }