Fixes some problems with the last commit

Author: joto

src/locator.cpp

@@ -82,6 +82,7 @@ void locator_t::build_index()
         m_data.emplace_back(region.box(), n++);
     }
 
+    m_rtree.clear();
     m_rtree.insert(m_data.cbegin(), m_data.cend());
 }
 

tests/bdd/flex/locator.feature

@@ -45,7 +45,7 @@ Feature: Locators
             NAME[]
             """
 
-    Scenario: Define a locator without name is okay
+    Scenario: Calling name() on locator with . instead of : does not work
         Given the OSM data
             """
             """

tests/bdd/steps/steps_execute.py

@@ -135,7 +135,10 @@ def setup_inline_lua_style(context):
 
 @given("the style file '(?P<style>.+)'")
 def setup_style_file(context, style):
-    context.osm2pgsql_params.extend(('-S', str(context.test_data_dir / style)))
+    if '-S' in context.osm2pgsql_params:
+        context.osm2pgsql_params[context.osm2pgsql_params.index('-S') + 1] = str(context.test_data_dir / style)
+    else:
+        context.osm2pgsql_params.extend(('-S', str(context.test_data_dir / style)))
 
 
 @when(r"running osm2pgsql (?P<output>\w+)(?: with parameters)?")