fixes for gcc 4.0

base/mysql.hh:
    include mysql_version to get rid of that annoying mysql error.
    make sure refcount is set in all constructors
base/pollevent.hh:
dev/ethertap.hh:
dev/pciconfigall.hh:
dev/tsunami_cchip.hh:
dev/tsunami_io.hh:
dev/tsunami_pchip.hh:
sim/param.cc:
    fix for gcc 4

--HG--
extra : convert_revision : be626af2f40ca402818996ef27249ae256c63ef1

dev/ethertap.hh

@@ -42,6 +42,9 @@
 #include "base/pollevent.hh"
 #include "sim/sim_object.hh"
 
+class TapEvent;
+class TapListener;
+
 /*
  * Interface to connect a simulated ethernet device to the real world
  */

dev/pciconfigall.hh

@@ -43,6 +43,7 @@ static const uint32_t MAX_PCI_DEV = 32;
 static const uint32_t MAX_PCI_FUNC = 8;
 
 class PciDev;
+class MemoryController;
 
 /**
  * PCI Config Space

dev/tsunami_cchip.hh

@@ -37,6 +37,8 @@
 #include "base/range.hh"
 #include "dev/io_device.hh"
 
+class MemoryController;
+
 /**
  * Tsunami CChip CSR Emulation. This device includes all the interrupt
  * handling code for the chipset.

dev/tsunami_io.hh

@@ -38,6 +38,8 @@
 #include "dev/tsunami.hh"
 #include "sim/eventq.hh"
 
+class MemoryController;
+
 /**
  * Tsunami I/O device is a catch all for all the south bridge stuff we care
  * to implement.

dev/tsunami_pchip.hh

@@ -37,6 +37,8 @@
 #include "base/range.hh"
 #include "dev/io_device.hh"
 
+class MemoryController;
+
 /**
  * A very simple implementation of the Tsunami PCI interface chips.
  */