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/atom.c b/src/compiler/preprocessor/atom.c
index 76bd448..c5636b7 100644
--- a/src/compiler/preprocessor/atom.c
+++ b/src/compiler/preprocessor/atom.c
@@ -619,7 +619,7 @@
 
 int InitAtomTable(AtomTable *atable, int htsize)
 {
-    int ii;
+    unsigned int ii;
 
     htsize = htsize <= 0 ? INIT_HASH_TABLE_SIZE : htsize;
     if (!InitStringTable(&atable->stable))