gcc48 patches

Fix/eliminate unused-but-set variables:

+Index: sys/arch/prep/stand/boot/pci.c
+===================================================================
+RCS file: /cvsroot/src/sys/arch/prep/stand/boot/pci.c,v
+retrieving revision 1.1
+diff -u -b -r1.1 pci.c
+--- sys/arch/prep/stand/boot/pci.c	19 May 2012 14:40:12 -0000	1.1
++++ sys/arch/prep/stand/boot/pci.c	13 Mar 2014 01:11:36 -0000
+@@ -158,7 +158,6 @@
+ 	int slot, r;
+ 	struct PCI_cinfo *pslot;
+ 	int VGAslot = -1;
+-	int highVGAslot = 0;
+ 
+ 	for (slot = start + 1; slot < PCI_NSLOTS; slot++) {
+ 		pslot = &PCI_slots[slot];
+@@ -171,7 +170,6 @@
+ 			    ((pslot->regs[CLASS] & 0xffffff00) ==
+ 				0x00010000)) {
+ 				/* it's a VGA card */
+-				highVGAslot = slot;
+ 				if ((pslot->regs[CMD] & 0x03)) {
+ 					/* fW enabled it */
+ 					VGAslot = slot;
+Index: sys/arch/prep/stand/boot/siop.c
+===================================================================
+RCS file: /cvsroot/src/sys/arch/prep/stand/boot/siop.c,v
+retrieving revision 1.1
+diff -u -b -r1.1 siop.c
+--- sys/arch/prep/stand/boot/siop.c	19 May 2012 14:40:13 -0000	1.1
++++ sys/arch/prep/stand/boot/siop.c	13 Mar 2014 01:32:14 -0000
+@@ -604,7 +604,7 @@
+ {
+ 	struct siop_xfer *siop_xfer = adp->xfer;
+ 	uint32_t dsa, *script = adp->script;
+-	int target, lun, slot;
++	int slot;
+ 	void *scriptaddr = (void *)local_to_PCI((u_long)script);
+ 	const int siop_common_xfer_size = sizeof(struct siop_common_xfer);
+ 
+@@ -631,8 +631,6 @@
+ 	} else {
+ 		slot++;
+ 	}
+-	target = xs->target;
+-	lun = xs->lun;
+ 	/*
+ 	 * find a free scheduler slot and load it.
+ 	 */


There is still a complaint of "may be used uninitialized" that needs
analysis and fixing.

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