add comment about pe.read

git-svn-id: file:///home/svn/framework3/trunk@9272 4d416f70-5f16-0410-b530-b9f4589650da

lib/rex/peparsey/pe.rb

@@ -194,6 +194,10 @@ class Pe < PeBase
 	#
 	# Read raw bytes from the specified offset in the underlying file
 	#
+	# NOTE: You should pass raw file offsets into this, not offsets from
+	# the beginning of the section. If you need to read from within a 
+	# section, add section.file_offset prior to passing the offset in.
+	#
 	def read(offset, len)
 		_isource.read(offset, len)
 	end