patch 8.0.1254: undefined left shift in gethexchrs()

Problem:    Undefined left shift in gethexchrs(). (geeknik)
Solution:   Use unsigned long. (idea by Christian Brabandt, closes #2255)

src/regexp.c

@@ -695,9 +695,9 @@ static void	skipchr_keepstart(void);
 static int	peekchr(void);
 static void	skipchr(void);
 static void	ungetchr(void);
-static int	gethexchrs(int maxinputlen);
-static int	getoctchrs(void);
-static int	getdecchrs(void);
+static long	gethexchrs(int maxinputlen);
+static long	getoctchrs(void);
+static long	getdecchrs(void);
 static int	coll_get_char(void);
 static void	regcomp_start(char_u *expr, int flags);
 static char_u	*reg(int, int *);
@@ -1837,7 +1837,7 @@ regpiece(int *flagp)
 	case Magic('@'):
 	    {
 		int	lop = END;
-		int	nr;
+		long	nr;
 
 		nr = getdecchrs();
 		switch (no_Magic(getchr()))
@@ -2278,7 +2278,7 @@ regatom(int *flagp)
 		case 'u':   /* %uabcd hex 4 */
 		case 'U':   /* %U1234abcd hex 8 */
 			  {
-			      int i;
+			      long i;
 
 			      switch (c)
 			      {
@@ -3274,10 +3274,10 @@ ungetchr(void)
  * The parameter controls the maximum number of input characters. This will be
  * 2 when reading a \%x20 sequence and 4 when reading a \%u20AC sequence.
  */
-    static int
+    static long
 gethexchrs(int maxinputlen)
 {
-    int		nr = 0;
+    long_u	nr = 0;
     int		c;
     int		i;
 
@@ -3293,17 +3293,17 @@ gethexchrs(int maxinputlen)
 
     if (i == 0)
 	return -1;
-    return nr;
+    return (long)nr;
 }
 
 /*
  * Get and return the value of the decimal string immediately after the
  * current position. Return -1 for invalid.  Consumes all digits.
  */
-    static int
+    static long
 getdecchrs(void)
 {
-    int		nr = 0;
+    long_u	nr = 0;
     int		c;
     int		i;
 
@@ -3320,7 +3320,7 @@ getdecchrs(void)
 
     if (i == 0)
 	return -1;
-    return nr;
+    return (long)nr;
 }
 
 /*
@@ -3331,10 +3331,10 @@ getdecchrs(void)
  *     blahblah\%o210asdf
  *	   before-^  ^-after
  */
-    static int
+    static long
 getoctchrs(void)
 {
-    int		nr = 0;
+    long_u	nr = 0;
     int		c;
     int		i;
 
@@ -3350,7 +3350,7 @@ getoctchrs(void)
 
     if (i == 0)
 	return -1;
-    return nr;
+    return (long)nr;
 }
 
 /*
@@ -3360,7 +3360,7 @@ getoctchrs(void)
     static int
 coll_get_char(void)
 {
-    int	    nr = -1;
+    long	nr = -1;
 
     switch (*regparse++)
     {

src/regexp_nfa.c

@@ -1522,7 +1522,7 @@ nfa_regatom(void)
 		case 'u':   /* %uabcd hex 4 */
 		case 'U':   /* %U1234abcd hex 8 */
 		    {
-			int nr;
+			long nr;
 
 			switch (c)
 			{
@@ -2040,7 +2040,7 @@ nfa_regpiece(void)
     int		greedy = TRUE;      /* Braces are prefixed with '-' ? */
     parse_state_T old_state;
     parse_state_T new_state;
-    int		c2;
+    long	c2;
     int		old_post_pos;
     int		my_post_start;
     int		quest;

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1254,
 /**/
     1253,
 /**/