Handle self calls better

lib/brakeman/processors/lib/find_all_calls.rb

@@ -121,6 +121,8 @@ class Brakeman::FindAllCalls < Brakeman::BaseProcessor
         exp[1]
       when :colon2
         class_name exp
+      when :self
+        @current_class || @current_module || nil
       else
         exp
       end

lib/brakeman/processors/lib/processor_helper.rb

@@ -24,6 +24,8 @@ module Brakeman::ProcessorHelper
         "::#{exp[1]}".to_sym
       when :call
         process exp
+      when :self
+        @current_class || @current_module || nil
       else
         raise "Error: Cannot get class name from #{exp}"
       end