Fix off by 1 error

i can increment > qs_kv_size with some inputs. Fix this
by incrementing earlier in the loop instead so we don't
have to increment after the loop and possibly go past
max.

Tested: Used bad string and no longer saw segfault

Change-Id: Ia68cd9b24e9a0b16646197983c513d78df2239ed
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/http/query_string.h b/http/query_string.h
index 1cc68fb..6fed49a 100644
--- a/http/query_string.h
+++ b/http/query_string.h
@@ -155,16 +155,14 @@
     i = 0;
     while (i < qs_kv_size)
     {
-        qs_kv[i] = substrPtr;
+        qs_kv[i++] = substrPtr;
         j = strcspn(substrPtr, "&");
         if (substrPtr[j] == '\0')
         {
             break;
         }
         substrPtr += j + 1;
-        i++;
     }
-    i++; // x &'s -> means x iterations of this loop -> means *x+1* k/v pairs
 
     // we only decode the values in place, the keys could have '='s in them
     // which will hose our ability to distinguish keys from values later