fix bug

bash_tools.sh

@@ -28,21 +28,22 @@ odict(){
 # Linux specific functions
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
 
-    set_wallpaper(){
+function set_wallpaper(){
     local file=$1
     # convert to abs path
     if [[ ! "$file" = /* ]]; then
         file=$(pwd)/$1
     fi
     gsettings set org.gnome.desktop.background picture-uri file://$file
-    }
+}
+
 
 fi
 
 # Mac OSX specific functions
 if [[ "$OSTYPE" == "darwin"* ]]; then
 
-    set_wallpaper(){
+function set_wallpaper(){
     local file=$1
     # convert to abs path
     if [[ ! "$file" = /* ]]; then
@@ -51,7 +52,7 @@ if [[ "$OSTYPE" == "darwin"* ]]; then
 
     apple_script_single_desk="tell application \"Finder\" to set desktop picture to POSIX file \"$file\""
     osascript -e "$apple_script_single_desk"
-    }
+}
 
 fi