close quotes on #error



git-svn-id: http://skia.googlecode.com/svn/trunk@734 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrConfig.h b/gpu/include/GrConfig.h
index e933b03..7169e2e 100644
--- a/gpu/include/GrConfig.h
+++ b/gpu/include/GrConfig.h
@@ -106,7 +106,7 @@
 #endif
 
 #if GR_DEBUG == GR_RELEASE
-    #error "GR_DEBUG and GR_RELEASE must not be the same
+    #error "GR_DEBUG and GR_RELEASE must not be the same"
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////