Fix trivial compile failures observed in buildbot

sql/ha_partition.cc

@@ -2975,7 +2975,7 @@ bool ha_partition::setup_engine_array(MEM_ROOT *mem_root)
     }
   }
 
-  my_afree((gptr) engine_array);
+  my_afree((void*) engine_array);
     
   if (create_handlers(mem_root))
   {
@@ -2986,7 +2986,7 @@ bool ha_partition::setup_engine_array(MEM_ROOT *mem_root)
   DBUG_RETURN(false);
 
 err:
-  my_afree((gptr) engine_array);
+  my_afree((void*) engine_array);
   DBUG_RETURN(true);
 }
 

sql/sp_head.h

@@ -364,12 +364,12 @@ public:
 
   /// Put the instruction on the backpatch list, associated with the label.
   int
-  push_backpatch(sp_instr *, struct sp_label *);
+  push_backpatch(sp_instr *, sp_label *);
 
   /// Update all instruction with this label in the backpatch list to
   /// the current position.
   void
-  backpatch(struct sp_label *);
+  backpatch(sp_label *);
 
   /// Start a new cont. backpatch level. If 'i' is NULL, the level is just incr.
   int
@@ -505,7 +505,7 @@ private:
   DYNAMIC_ARRAY m_instr;	///< The "instructions"
   typedef struct
   {
-    struct sp_label *lab;
+    sp_label *lab;
     sp_instr *instr;
   } bp_t;
   List<bp_t> m_backpatch;	///< Instructions needing backpatching

sql/sql_error.cc

@@ -347,7 +347,7 @@ Diagnostics_area::reset_diagnostics_area()
 {
   DBUG_ENTER("reset_diagnostics_area");
 #ifdef DBUG_OFF
-  can_overwrite_status= FALSE;
+  m_can_overwrite_status= FALSE;
   /** Don't take chances in production */
   m_message[0]= '\0';
   m_sql_errno= 0;