Minor fixes to build under Clang:
  - Remove an unused ctor that was wrong anyway.
  - Add magic angle brackets to a template declaration.

Patch-by: Evan Martin

git-svn-id: http://skia.googlecode.com/svn/trunk@563 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/images/SkImageDecoder_Factory.cpp b/src/images/SkImageDecoder_Factory.cpp
index e7c71e5..2090d85 100644
--- a/src/images/SkImageDecoder_Factory.cpp
+++ b/src/images/SkImageDecoder_Factory.cpp
@@ -22,7 +22,7 @@
 
 typedef SkTRegistry<SkImageDecoder*, SkStream*> DecodeReg;
 
-template DecodeReg* DecodeReg::gHead;
+template<> DecodeReg* DecodeReg::gHead;
 
 #ifdef SK_ENABLE_LIBPNG
     extern SkImageDecoder* sk_libpng_dfactory(SkStream*);