Revert "eina: fix CID 1106340: Logically dead code (DEADCODE) reported by coverity."

This reverts commit 1c1b48ca64.

this commit is causing all sorts of hell and crashes, hangs and what
not. like:

Thread 1 (Thread 0x7feb7389e780 (LWP 7149)):
No symbol table info available.
No symbol table info available.
    at lib/eina/eina_inlist.c:422
            l = 0xf38a50
                    __FUNCTION__ = "eina_inlist_demote"
                    #3  0x00007feb6a809867 in
_eina_chained_mempool_alloc_in (
    pool=pool@entry=0x8650a0, p=p@entry=0xf38a50)
        at modules/eina/mp/chained_pool/eina_chained_mempool.c:197
                mem = 0xf3a690
                #4  0x00007feb6a809dff in eina_chained_mempool_malloc
(data=0x8650a0,
    size=<optimized out>)
        at modules/eina/mp/chained_pool/eina_chained_mempool.c:300
                pool = 0x8650a0
                        p = 0xf38a50
                                mem = <optimized out>
                                #5  0x00007feb6a7e451f in
eina_mempool_malloc (size=40, mp=<optimized out>)
    at lib/eina/eina_inline_mempool.x:103
    No locals.
    #6  _eina_list_mempool_list_new (list=0x7feb5402a510)
        at lib/eina/eina_list.c:199
        No locals.
        #7  eina_list_append (list=0x7feb5402a510, data=0xf41720)
            at lib/eina/eina_list.c:534
                    l = <optimized out>
                            __FUNCTION__ = "eina_list_append"
                            #8  0x0000000000445d1a in
e_bindings_signal_add (ctxt=<optimized out>,
    sig=0x947e6c "mouse,clicked,[12]", src=0x92248c "e.event.close",
        mod=E_BINDING_MODIFIER_NONE, any_mod=1, action=0x93479c
"window_close",
    params=0x0) at e_bindings.c:1036
            binding = 0xf41720
            #9  0x00000000004469d4 in e_bindings_init () at
e_bindings.c:68
        ebs = 0x947df0
                ebm = <optimized out>
                        ebw = <optimized out>
                                ebe = <optimized out>
                                        ebk = <optimized out>
                                                eba = <optimized out>
                                                        l = 0x9532e0
                                                        #10
0x0000000000437516 in main (argc=<optimized out>, argv=<optimized out>)
    at e_main.c:941
            safe_mode = 0 '\000'
                    after_restart = 1 '\001'
                            waslocked = 0 '\000'
                                    t = <optimized out>
                                            tstart = <optimized out>
                                                    s = <optimized out>
                                                            buff =
"1381800872.3", '\000' <repeats 19 times>
        action = {__sigaction_handler = {
                    sa_handler = 0x4fca00 <e_sigabrt_act>,
                                sa_sigaction = 0x4fca00
<e_sigabrt_act>}, sa_mask = {__val = {
              0 <repeats 16 times>}}, sa_flags = -1073741820,
                        sa_restorer = 0x0}
                                __FUNCTION__ = "main"
                                Detaching from program:
/usr/local/bin/enlightenment, process 7149

src/lib/eina/eina_inline_lock_posix.x

@@ -608,11 +608,10 @@ eina_spinlock_take(Eina_Spinlock *spinlock)
         {
            if (errno == EBUSY) sched_yield();
            else if (errno == EDEADLK) return EINA_LOCK_DEADLOCK;
-           else return EINA_LOCK_FAIL;
         }
    } while (t != 0);
 
-   return EINA_LOCK_SUCCEED;
+   return t ? EINA_LOCK_FAIL : EINA_LOCK_SUCCEED;
 #else
    return eina_lock_take(spinlock);
 #endif