eo: Fix compilation of benchmark

- Missing Eo* self in method declarations.
- Gcc complaining about variable-sized object being initialized.

src/benchmarks/eo/class_simple.h

@@ -6,10 +6,10 @@ typedef struct
    int a;
 } Simple_Public_Data;
 
-EAPI void simple_a_set(int a);
+EAPI void simple_a_set(Eo *self, int a);
 /* Calls simple_other_call(other, obj) and then simple_other_call(obj, other)
  * for 'times' times in order to grow the call stack on other objects. */
-EAPI void simple_other_call(Eo *other, int times);
+EAPI void simple_other_call(Eo*self, Eo *other, int times);
 
 #define SIMPLE_CLASS simple_class_get()
 const Eo_Class *simple_class_get(void);

src/benchmarks/eo/eo_bench_callbacks.c

@@ -50,7 +50,7 @@ bench_eo_callbacks_call(int request)
 
    const int len = EINA_C_ARRAY_LENGTH(distribution);
    int i, j;
-   Eo *obj[len] = { 0 };
+   Eo *obj[len];
    for (i = 0 ; i < len ; i++)
      {
         obj[i] = eo_add(SIMPLE_CLASS, NULL);