Fix warnings about comparison/assignement between signed and unsigned types. Submitted by timeless.
BUG=13
Review URL: http://codereview.appspot.com/1895051

git-svn-id: https://angleproject.googlecode.com/svn/trunk@378 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/compiler/preprocessor/tokens.c b/src/compiler/preprocessor/tokens.c
index 57da5da..057cce8 100644
--- a/src/compiler/preprocessor/tokens.c
+++ b/src/compiler/preprocessor/tokens.c
@@ -205,7 +205,7 @@
 void RecordToken(TokenStream *pTok, int token, yystypepp * yylvalpp)
 {
     const char *s;
-    unsigned char *str=NULL;
+    char *str=NULL;
 
     if (token > 256)
         lAddByte(pTok, (unsigned char)((token & 0x7f) + 0x80));