Fix to compile with guile-1.3.4 on RH7.3 (our 1.8.x base platform).

[Derek Atkins]

Log Message:
-----------
Fix to compile with guile-1.3.4 on RH7.3 (our 1.8.x base platform).

	* src/report/locale-specific/us/gncmod-locale-reports-us.c:
	  guile-1.3.4 gh_eal_str() requires a char*, not a const char*
	  So we're removing the const here for older systems with
	  "ancient" guile.

Tags:
----
gnucash-1-8-branch

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/report/locale-specific/us:
        gncmod-locale-reports-us.c