patch 8.0.1227: undefined left shift in readfile()

Problem:    Undefined left shift in readfile(). (Brian 'geeknik' Carpenter)
Solution:   Add cast to unsigned. (Dominique Pelle, closes #2253)

Author: brammool

src/fileio.c

@@ -1956,17 +1956,17 @@ readfile(
 		    {
 			if (fio_flags & FIO_ENDIAN_L)
 			{
-			    u8c = (*--p << 24);
-			    u8c += (*--p << 16);
-			    u8c += (*--p << 8);
+			    u8c = (unsigned)*--p << 24;
+			    u8c += (unsigned)*--p << 16;
+			    u8c += (unsigned)*--p << 8;
 			    u8c += *--p;
 			}
 			else	/* big endian */
 			{
 			    u8c = *--p;
-			    u8c += (*--p << 8);
-			    u8c += (*--p << 16);
-			    u8c += (*--p << 24);
+			    u8c += (unsigned)*--p << 8;
+			    u8c += (unsigned)*--p << 16;
+			    u8c += (unsigned)*--p << 24;
 			}
 		    }
 		    else    /* UTF-8 */

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1227,
 /**/
     1226,
 /**/