re PR target/39063 (libgcc2.c:mprotect() for mingw, incompatible pointer type warning)

	PR target/39063
	* libgcc2.c (mprotect): Do not use signed arguments for
	VirtualProtect, use DWORD arguments.  Also fix the 'may
	be used uninitialized' warning for the np variable.

From-SVN: r144957

gcc/ChangeLog

+2009-03-19  Ozkan Sezer <sezeroz@gmail.com>
+
+	PR target/39063
+	* libgcc2.c (mprotect): Do not use signed arguments for
+	VirtualProtect, use DWORD arguments.  Also fix the 'may
+	be used uninitialized' warning for the np variable.
+
 2009-03-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/39496

gcc/libgcc2.c

@@ -2068,7 +2068,7 @@ getpagesize (void)
 int
 mprotect (char *addr, int len, int prot)
 {
-  int np, op;
+  DWORD np, op;
 
   if (prot == 7)
     np = 0x40;
@@ -2082,6 +2082,8 @@ mprotect (char *addr, int len, int prot)
     np = 0x02;
   else if (prot == 0)
     np = 0x01;
+  else
+    return -1;
 
   if (VirtualProtect (addr, len, np, &op))
     return 0;