Remove unreachable statements

Solaris Workshop Compiler found a few unreachable statements.

Signed-off-by: Guido Ostkamp <git@ostkamp.fastmail.fm>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-apply.c

@@ -683,7 +683,6 @@ static char *git_header_name(char *line, int llen)
 			}
 		}
 	}
-	return NULL;
 }
 
 /* Verify that we recognize the lines following a git header */

utf8.c

@@ -284,7 +284,6 @@ int print_wrapped_text(const char *text, int indent, int indent2, int width)
 			text++;
 		}
 	}
-	return w;
 }
 
 int is_encoding_utf8(const char *name)

xdiff/xdiffi.c

@@ -257,8 +257,6 @@ static long xdl_split(unsigned long const *ha1, long off1, long lim1,
 			return ec;
 		}
 	}
-
-	return -1;
 }
 
 

xdiff/xutils.c

@@ -232,8 +232,6 @@ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
 		return i1 >= s1 && i2 >= s2;
 	} else
 		return s1 == s2 && !memcmp(l1, l2, s1);
-
-	return 0;
 }
 
 static unsigned long xdl_hash_record_with_whitespace(char const **data,