Nyan cat in c

https://github.com/LAMMJohnson/nyancat.git

Fix your makefile

nyan.c: In function ‘stretch_images’:
nyan.c:479: error: ‘for’ loop initial declarations are only allowed in C99 mode
nyan.c:479: note: use option -std=c99 or -std=gnu99 to compile your code
make: *** [nyan] Error 1