Changed uchar to unsigned char in function ParseBytecodeBuffer, because seemingly it affects opt in uncertain ways :)

llvm-svn: 3866
diff --git a/llvm/lib/Bytecode/Reader/Reader.cpp b/llvm/lib/Bytecode/Reader/Reader.cpp
index dd75d7f..22b1592 100644
--- a/llvm/lib/Bytecode/Reader/Reader.cpp
+++ b/llvm/lib/Bytecode/Reader/Reader.cpp
@@ -559,7 +559,7 @@
 }
 
 
-Module *ParseBytecodeBuffer(const uchar *Buffer, unsigned Length) {
+Module *ParseBytecodeBuffer(const unsigned char *Buffer, unsigned Length) {
   BytecodeParser Parser;
   return Parser.ParseBytecode(Buffer, Buffer+Length);
 }