cleanup: remove unused init_dynamic_array and init_dynamic_array2 symbols,

as only my_init_dynamic_array and my_init_dynamic_array2 are used everywhere.
fix ha_cassandra to compile.

include/my_sys.h

@@ -785,9 +785,8 @@ extern my_bool real_open_cached_file(IO_CACHE *cache);
 extern void close_cached_file(IO_CACHE *cache);
 File create_temp_file(char *to, const char *dir, const char *pfx,
 		      int mode, myf MyFlags);
-#define my_init_dynamic_array(A,B,C,D,E) init_dynamic_array2(A,B,NULL,C,D,E)
-#define my_init_dynamic_array2(A,B,C,D,E,F) init_dynamic_array2(A,B,C,D,E,F)
-extern my_bool init_dynamic_array2(DYNAMIC_ARRAY *array, uint element_size,
+#define my_init_dynamic_array(A,B,C,D,E) my_init_dynamic_array2(A,B,NULL,C,D,E)
+extern my_bool my_init_dynamic_array2(DYNAMIC_ARRAY *array, uint element_size,
                                    void *init_buffer, uint init_alloc,
                                    uint alloc_increment, myf my_flags);
 extern my_bool insert_dynamic(DYNAMIC_ARRAY *array, const uchar * element);

mysys/array.c

@@ -22,7 +22,7 @@
   Initiate dynamic array
 
   SYNOPSIS
-    init_dynamic_array2()
+    my_init_dynamic_array2()
       array		Pointer to an array
       element_size	Size of element
       init_buffer       Initial buffer pointer
@@ -31,7 +31,7 @@
       my_flags		Flags to my_malloc
 
   DESCRIPTION
-    init_dynamic_array() initiates array and allocate space for
+    my_init_dynamic_array2() initiates array and allocate space for
     init_alloc eilements.
     Array is usable even if space allocation failed, hence, the
     function never returns TRUE.
@@ -41,11 +41,11 @@
     FALSE	Ok
 */
 
-my_bool init_dynamic_array2(DYNAMIC_ARRAY *array, uint element_size,
+my_bool my_init_dynamic_array2(DYNAMIC_ARRAY *array, uint element_size,
                             void *init_buffer, uint init_alloc, 
                             uint alloc_increment, myf my_flags)
 {
-  DBUG_ENTER("init_dynamic_array2");
+  DBUG_ENTER("my_init_dynamic_array2");
   if (!alloc_increment)
   {
     alloc_increment=max((8192-MALLOC_OVERHEAD)/element_size,16);

storage/cassandra/ha_cassandra.cc

@@ -1467,12 +1467,12 @@ bool ha_cassandra::setup_field_converters(Field **field_arg, uint n_fields)
     special_type_field_names=
       ((LEX_STRING*)(special_type_field_converters + max_non_default_fields));
 
-    if (init_dynamic_array(&dynamic_values,
+    if (my_init_dynamic_array(&dynamic_values,
                            sizeof(DYNAMIC_COLUMN_VALUE),
                            DYNCOL_USUAL, DYNCOL_DELTA))
       DBUG_RETURN(true);
     else
-      if (init_dynamic_array(&dynamic_names,
+      if (my_init_dynamic_array(&dynamic_names,
                              sizeof(LEX_STRING),
                              DYNCOL_USUAL, DYNCOL_DELTA))
       {