explicitly define the gHead for the codec llist



git-svn-id: http://skia.googlecode.com/svn/trunk@85 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/images/SkImageDecoder_Factory.cpp b/src/images/SkImageDecoder_Factory.cpp
index 3300981..9dd9913 100644
--- a/src/images/SkImageDecoder_Factory.cpp
+++ b/src/images/SkImageDecoder_Factory.cpp
@@ -22,6 +22,8 @@
 
 typedef SkTRegistry<SkImageDecoder*, SkStream*> DecodeReg;
 
+template DecodeReg* DecodeReg::gHead;
+
 SkImageDecoder* SkImageDecoder::Factory(SkStream* stream) {
     const DecodeReg* curr = DecodeReg::Head();
     while (curr) {
diff --git a/src/images/SkImageEncoder_Factory.cpp b/src/images/SkImageEncoder_Factory.cpp
index f44cd8f..d673167 100644
--- a/src/images/SkImageEncoder_Factory.cpp
+++ b/src/images/SkImageEncoder_Factory.cpp
@@ -19,6 +19,8 @@
 
 typedef SkTRegistry<SkImageEncoder*, SkImageEncoder::Type> EncodeReg;
 
+template EncodeReg* EncodeReg::gHead;
+
 SkImageEncoder* SkImageEncoder::Create(Type t) {
     const EncodeReg* curr = EncodeReg::Head();
     while (curr) {