Fix some Clang warnings.

Change-Id: I2966f9475308ac44050419c336979614a8037225

Author: Steinar H. Gunderson

unittest/gunit/gis_algos-t.cc

@@ -249,10 +249,6 @@ TEST_F(GeometryManipulationTest, PolygonManipulationTest) {
                      ls0->get_flags(), ls0->get_srid());
   Gis_line_string ls00(*ls0);
 
-  ls = ls;
-  ls00 = ls00;
-  plgn = plgn;
-
   Geometry_buffer buffer3;
   String wkt3, str3;
 

utilities/comp_err.cc

@@ -657,7 +657,6 @@ static bool parse_reserved_error_section(char *str) {
   char *offset;
   char *end;
   int error;
-  err_range range;
 
   DBUG_ENTER("parse_reserved_error_section");