Fixed compile error on a few linux buildbots. Included string.h for memset. 
Review URL: http://codereview.appspot.com/1218041

git-svn-id: https://angleproject.googlecode.com/svn/trunk@288 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/compiler/PoolAlloc.h b/src/compiler/PoolAlloc.h
index 36626b2..0fa3194 100644
--- a/src/compiler/PoolAlloc.h
+++ b/src/compiler/PoolAlloc.h
@@ -32,6 +32,7 @@
 //
 
 #include <stddef.h>
+#include <string.h>
 #include <vector>
 
 // If we are using guard blocks, we must track each indivual