re PR fortran/31922 ([4.2 only] Accessing uninitialized variable for print *, trim(blank_string))

2007-05-15  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/31922
	* intrinsics/string_intrinsics.c (string_trim): Set result to null if
	string length is zero.

From-SVN: r124754

libgfortran/ChangeLog

+2007-05-15  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libfortran/31922
+	* intrinsics/string_intrinsics.c (string_trim): Set result to null if
+	string length is zero.
+
 2007-05-15  Tobias Burnus  <burnus@net-b.de>
 
 	PR libfortran/31915

libgfortran/intrinsics/string_intrinsics.c

@@ -171,6 +171,8 @@ string_trim (GFC_INTEGER_4 * len, void ** dest, GFC_INTEGER_4 slen,
       /* copy string if necessary.  */
       memmove (*dest, src, *len);
     }
+  else
+    *dest = NULL;
 }