msvcrt: Remove unneeded casts.

dlls/msvcrt/dir.c

@@ -601,10 +601,10 @@ unsigned int CDECL MSVCRT__getdiskfree(unsigned int disk, struct MSVCRT__diskfre
 
   if (GetDiskFreeSpaceW(disk==0?NULL:drivespec,ret,ret+1,ret+2,ret+3))
   {
-    d->sectors_per_cluster = (unsigned)ret[0];
-    d->bytes_per_sector = (unsigned)ret[1];
-    d->avail_clusters = (unsigned)ret[2];
-    d->total_clusters = (unsigned)ret[3];
+    d->sectors_per_cluster = ret[0];
+    d->bytes_per_sector = ret[1];
+    d->avail_clusters = ret[2];
+    d->total_clusters = ret[3];
     return 0;
   }
   err = GetLastError();

dlls/msvcrt/thread.c

@@ -108,8 +108,8 @@ MSVCRT_uintptr_t CDECL _beginthreadex(
 
   /* FIXME */
   return (MSVCRT_uintptr_t)CreateThread(security, stack_size,
-				     (LPTHREAD_START_ROUTINE) start_address,
-				     arglist, initflag, (LPDWORD) thrdaddr);
+				     start_address, arglist,
+				     initflag, thrdaddr);
 }
 
 /*********************************************************************