lib/cpu/shared.rb in cpu-0.0.4 vs lib/cpu/shared.rb in cpu-0.0.6

@@ -1,10 +1,10 @@
 module CPU
   module Shared
     # Returns the number of processors in this computer
     def num_processors
-      if @num_processors
+      if defined?(@num_processors)
         @num_processors
       else
         CPU.num_processors
       end
     end
@@ -13,10 +13,10 @@
     # object the CPU::Shared module was mixed into).
     attr_writer :num_processors
 
     # Returns the number of cores in this computer
     def num_cores
-      if @num_cores
+      if defined?(@num_cores)
         @num_cores
       else
         CPU.num_cores
       end
     end