Description of problem:
Starting ninvaders from the terminal works. When I hit "space" as it asks me to, it crashes. 

Version-Release number of selected component:
ninvaders-0.1.1-8.fc19

Additional info:
reporter:       libreport-2.1.5
backtrace_rating: 4
cmdline:        nInvaders
crash_function: render
executable:     /usr/bin/nInvaders
kernel:         3.9.9-301.fc19.x86_64
runlevel:       N 5
uid:            1000

Truncated backtrace:
[New LWP 29710]
Core was generated by `nInvaders'.
Program terminated with signal 11, Segmentation fault.
#0  render () at aliens.c:167
167			lowest_ship[k]=-1;

Thread 1 (LWP 29710):
#0  render () at aliens.c:167
No locals.
#1  0x0000000000405718 in initLevel () at nInvaders.c:58
No locals.
#2  handleTimer () at nInvaders.c:224
        aliens_move_counter = 0
        aliens_shot_counter = 0
        player_shot_counter = 0
        ufo_move_counter = 0
        title_animation_counter = 3
        game_over_counter = 0
#3  <signal handler called>
No locals.
#4  0x00000034d08e696e in __read_nocancel () at ../sysdeps/unix/syscall-template.S:81
No locals.
#5  0x00000031d5a0caaa in read (__nbytes=1, __buf=0x7fff1ae9018f, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
No locals.
#6  fifo_push (sp=0x2515710) at ../../ncurses/base/lib_getch.c:281
        c2 = 0 '\000'
        n = <optimized out>
        ch = 0
        mask = <optimized out>
#7  kgetch (sp=0x2515710) at ../../ncurses/base/lib_getch.c:682
        ptr = 0x2538e60
        ch = <optimized out>
        timeleft = 1000
#8  _nc_wgetch (win=win@entry=0x252dc80, result=result@entry=0x7fff1ae9026c, use_meta=<optimized out>) at ../../ncurses/base/lib_getch.c:513
        runcount = 0
        sp = 0x2515710
        ch = <optimized out>
        rc = <optimized out>
#9  0x00000031d5a0d1b5 in wgetch (win=0x252dc80) at ../../ncurses/base/lib_getch.c:643
        code = <optimized out>
        value = 0
#10 0x0000000000405a30 in readInput () at nInvaders.c:139
        ch = <optimized out>
        lastmove = 0
#11 0x0000000000401017 in main (argc=<optimized out>, argv=<optimized out>) at nInvaders.c:347
No locals.
From                To                  Syms Read   Shared Object Library
0x00000031d5a06d50  0x00000031d5a20164  Yes         /lib64/libncurses.so.5
0x0000003e7400ce40  0x0000003e740188d8  Yes         /lib64/libtinfo.so.5
0x00000034d081f410  0x00000034d0961d30  Yes         /lib64/libc.so.6
0x00000034d0c00ed0  0x00000034d0c019d0  Yes         /lib64/libdl.so.2
0x00000034d0400ae0  0x00000034d041ac3a  Yes         /lib64/ld-linux-x86-64.so.2
$1 = 0x0
No symbol "__glib_assert_msg" in current context.
rax            0x60d000	6344704
rbx            0x3e8	1000
rcx            0x1	1
rdx            0x14	20
rsi            0x14	20
rdi            0x253ef60	39055200
rbp            0xffffffff	0xffffffff
rsp            0x7fff1ae8fce8	0x7fff1ae8fce8
r8             0x253ef60	39055200
r9             0x0	0
r10            0x0	0
r11            0x1	1
r12            0x7fff1ae9018f	140733644865935
r13            0x252dc80	38984832
r14            0x2515710	38885136
r15            0x2538e60	39030368
rip            0x404dd0	0x404dd0 <render+48>
eflags         0x10216	[ PF AF IF RF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0
Dump of assembler code for function render:
   0x0000000000404da0 <+0>:	movl   $0x1,0x207532(%rip)        # 0x60c2dc <aliens+12>
   0x0000000000404daa <+10>:	movl   $0xffffffff,0x207524(%rip)        # 0x60c2d8 <aliens+8>
   0x0000000000404db4 <+20>:	mov    $0x60c340,%eax
   0x0000000000404db9 <+25>:	movl   $0xffffffff,0x20751d(%rip)        # 0x60c2e0 <aliens+16>
   0x0000000000404dc3 <+35>:	movl   $0x0,0x20751b(%rip)        # 0x60c2e8 <shipnum>
   0x0000000000404dcd <+45>:	nopl   (%rax)
=> 0x0000000000404dd0 <+48>:	movl   $0xffffffff,(%rax)
   0x0000000000404dd6 <+54>:	add    $0x4,%rax
   0x0000000000404dda <+58>:	jmp    0x404dd0 <render+48>
End of assembler dump.