binscripts/rvm-update-head in rvm-1.0.2 vs binscripts/rvm-update-head in rvm-1.0.3

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
 
-if [[ -z "$rvm_ignore_rvmrc" ]]; then
+rvm_ignore_rvmrc=${rvm_ignore_rvmrc:-0}
+if [[ $rvm_ignore_rvmrc -eq 0 ]]; then
   [[ -s /etc/rvmrc ]] && source /etc/rvmrc
   [[ -s "$HOME/.rvmrc" ]] && source "$HOME/.rvmrc"
 fi
 
 rvm_path="${rvm_path:-$HOME/.rvm}"