version 0.7.1, added better error checking for non-existent C source

lib/pry/commands.rb

@@ -557,7 +557,7 @@ e.g: show-method hello_method
       # Try to find source for C methods using MethodInfo (if possible)
       if Pry.has_pry_doc && meth.source_location.nil?
         info = Pry::MethodInfo.info_for(meth)
-        if !info
+        if !info || !info.source
           output.puts "Cannot find source for C method: #{meth_name}"
           next
         end

lib/pry/version.rb

@@ -1,3 +1,3 @@
 class Pry
-  VERSION = "0.7.0"
+  VERSION = "0.7.1"
 end