Fixed bug introduced when fixing issue 896

lib/git.zsh

@@ -69,11 +69,6 @@ git_prompt_status() {
   echo $STATUS
 }
 
-#this is unlikely to change so make it all statically assigned
-POST_1_7_2_GIT=$(git_compare_version "1.7.2")
-#clean up the namespace slightly by removing the checker function
-unset -f git_compare_version()
-
 #compare the provided version of git to the version installed and on path
 #prints 1 if input version <= installed version
 #prints -1 otherwise 
@@ -93,4 +88,9 @@ function git_compare_version() {
   echo 1
 }
 
+#this is unlikely to change so make it all statically assigned
+POST_1_7_2_GIT=$(git_compare_version "1.7.2")
+#clean up the namespace slightly by removing the checker function
+unset -f git_compare_version
+