Return the correct length of nmea sentence.

Return the correct length of nmea sentence in the
function loc_eng_nmea_put_checksum(). The correct
length is length of NMEA string including ‘$’
character alongwith length of checksum.

CRs-Fixed: 1020044
Change-Id: I45a086190008df79a93b9386bc69d9c50e47c93b
diff --git a/msm8996/loc_api/libloc_api_50001/loc_eng_nmea.cpp b/msm8996/loc_api/libloc_api_50001/loc_eng_nmea.cpp
index 424038c..95338f5 100644
--- a/msm8996/loc_api/libloc_api_50001/loc_eng_nmea.cpp
+++ b/msm8996/loc_api/libloc_api_50001/loc_eng_nmea.cpp
@@ -89,8 +89,12 @@
         length++;
     }
 
+    // length now contains nmea sentence string length not including $ sign.
     int checksumLength = snprintf(pNmea,(maxSize-length-1),"*%02X\r\n", checksum);
-    return (length + checksumLength);
+
+    // total length of nmea sentence is length of nmea sentence inc $ sign plus
+    // length of checksum (+1 is to cover the $ character in the length).
+    return (length + checksumLength + 1);
 }
 
 /*===========================================================================