Go patch committed: Always initialize mpfr in integer import

[Ian Lance Taylor via Gcc-patches]

This patch to the Go frontend corrects the integer import code to
always initialize an mpfr value.  The test case for this is
https://go.dev/cl/413980.  This fixes https://go.dev/issue/52862.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

722750a44a93ce7d23e09df240d8ab700a2d30e6
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index e20212e990a..f84347ea575 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-6a7ba754e5d98efe0875f1f41f40098e976e7958
+6edae0ef6521569e8f949aaaafa9dc1139825051
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 734ecb9492e..135dae02262 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -2715,7 +2715,7 @@ Integer_expression::do_import(Import_expression* imp, 
Location loc)
          return Expression::make_error(loc);
        }
       if (pos == std::string::npos)
-       mpfr_set_ui(real, 0, MPFR_RNDN);
+       mpfr_init_set_ui(real, 0, MPFR_RNDN);
       else
        {
          std::string real_str = num.substr(0, pos);