Rubocop does not want us to use ==0

Addressing rubocop comments like:
C: Use **.zero? instead of ** == 0.

I think rubocop developers could be employed in Brussels.

Author: isimluk

lib/openscap/ds/arf.rb

@@ -44,7 +44,7 @@ def test_result(id = nil)
 
       def test_result=(tr)
         source = tr.source
-        OpenSCAP.raise! unless OpenSCAP.ds_rds_session_replace_report_with_source(@session, source.raw) == 0
+        OpenSCAP.raise! unless OpenSCAP.ds_rds_session_replace_report_with_source(@session, source.raw).zero?
       end
 
       def report_request(id = nil)

lib/openscap/source.rb

@@ -43,7 +43,7 @@ def validate!
     end
 
     def save(filepath = nil)
-      OpenSCAP.raise! unless OpenSCAP.oscap_source_save_as(@raw, filepath) == 0
+      OpenSCAP.raise! unless OpenSCAP.oscap_source_save_as(@raw, filepath).zero?
     end
 
     def destroy

lib/openscap/xccdf/policy_model.rb

@@ -42,7 +42,7 @@ def destroy
 
       def policies_init
         policies = {}
-        OpenSCAP.raise! unless OpenSCAP.xccdf_policy_model_build_all_useful_policies(raw) == 0
+        OpenSCAP.raise! unless OpenSCAP.xccdf_policy_model_build_all_useful_policies(raw).zero?
         polit = OpenSCAP.xccdf_policy_model_get_policies raw
         while OpenSCAP.xccdf_policy_iterator_has_more polit
           policy_p = OpenSCAP.xccdf_policy_iterator_next polit

lib/openscap/xccdf/session.rb

@@ -33,7 +33,7 @@ def load(opts = {})
           OpenSCAP.xccdf_session_set_component_id(@s, o[:component_id])
         end
         OpenSCAP.raise! unless OpenSCAP.xccdf_session_load(@s).zero?
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_load_check_engine_plugins(@s) == 0
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_load_check_engine_plugins(@s).zero?
       end
 
       def profile=(p)
@@ -48,7 +48,7 @@ def evaluate
       end
 
       def remediate
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_remediate(@s) == 0
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_remediate(@s).zero?
       end
 
       def export_results(opts = {})
@@ -72,10 +72,10 @@ def destroy
       private
 
       def export
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_oval(@s) == 0
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_check_engine_plugins(@s) == 0
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_xccdf(@s) == 0
-        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_arf(@s) == 0
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_oval(@s).zero?
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_check_engine_plugins(@s).zero?
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_xccdf(@s).zero?
+        OpenSCAP.raise! unless OpenSCAP.xccdf_session_export_arf(@s).zero?
       end
 
       def export_targets(opts = {})

lib/openscap/xccdf/testresult.rb

@@ -49,7 +49,7 @@ def score
       def score!(benchmark)
         # recalculate the scores in the scope of given benchmark
         @score = nil
-        OpenSCAP.raise! unless OpenSCAP.xccdf_result_recalculate_scores(@raw, benchmark.raw) == 0
+        OpenSCAP.raise! unless OpenSCAP.xccdf_result_recalculate_scores(@raw, benchmark.raw).zero?
         score
       end