Fixed issue where an index in qs_parse is incorrectly incremented bey…

…ond the maximum possible value

(cherry picked from commit 79eec91)

include/crow/query_string.h

@@ -115,11 +115,10 @@ inline int qs_parse(char * qs, char * qs_kv[], int qs_kv_size)
     {
         qs_kv[i] = substr_ptr;
         j = strcspn(substr_ptr, "&");
-        if ( substr_ptr[j] == '\0' ) {  break;  }
+        if ( substr_ptr[j] == '\0' ) { i++; break;  } // x &'s -> means x iterations of this loop -> means *x+1* k/v pairs
         substr_ptr += 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