Bootcamp partition failure, 122GB allocated space for windows lost. Its showing as used space in Mac HDD, the space for windows was no freed, no drive to erase.

Hello, everyone !!

I decided to install windows 7 on my Macbook (2.4 GHz Intel Core 2 Duo, 2 GB, 1067 MHz DDR3 OSX 10.8.4). I allocated 122 GB for windows and i ran bootcamp and everything was going alright. All of a sudden everything froze, nothing happened for about an hour, i knew if i powered it off things would get messy, but then i had to do it. When it booted again, no windows partition was created, understandably so. When i checked the free space on my Mac HDD, i found out that the 122 GB i had allocated for my windows was not freed, it just occupied as used space my Mac HDD. I tried everything in disk utility, but then in that there is just one Mac Partition with 250 GB, there is no windows partition to delete. The space that i had allocated for windows has not been freed and i do not have anything to erase in the disk utility. How do i free the 122 GB, i have attached screen shots.

Available space should be around 145 GB but then the space i had allocated for the windows partition is lost. How do i recover it? I dont have any backups hence formatting it will be exceedingly painful. Any troubleshooting advices will be appreciated. Cheer !!