Fix svn restore issues on Windows

bin/backup-svn-repo

@@ -37,12 +37,12 @@ if [[ $repo_path == "" || $output_path == "" ]]; then
     exit 1
 fi
 
-if [[ ! -d $repo_path ]]; then
+if [[ ! -d "$repo_path" ]]; then
     error "Repo directory '$repo_path' doesn't exist."
     exit 1
 fi
 
-mkdir -p $output_path
+mkdir -p "$output_path"
 
 now=$(echo $(date '+%Y-%m-%d-%H-%M-%S'))
 backup_path="$output_path/${now}_jellypixel_repos.dump.gz"
@@ -55,4 +55,4 @@ if [[ ! ($proceed == "1" || $proceed == "y") ]]; then
     exit 1
 fi
 
-svnadmin.exe dump $repo_path | gzip -9 > $backup_path
+svnadmin.exe dump "$repo_path" | gzip -9 > "$backup_path"