Use const reference for decimal_from_string argument

No functional change.

gdb/ChangeLog:
2017-10-24  Ulrich Weigand  <uweigand@de.ibm.com>

	* dfp.h (decimal_from_string): Use const reference for argument.
	* dfp.c (decimal_from_string): Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/dfp.c b/gdb/dfp.c
index 1cdb35c..a13e260 100644
--- a/gdb/dfp.c
+++ b/gdb/dfp.c
@@ -190,7 +190,7 @@ decimal_to_string (const gdb_byte *decbytes, int len,
    decimal64 and 16 bytes for decimal128.  */
 bool
 decimal_from_string (gdb_byte *decbytes, int len, enum bfd_endian byte_order,
-		     std::string string)
+		     const std::string &string)
 {
   decContext set;
   gdb_byte dec[16];