[JSCRIPT] Sync with Wine Staging 1.9.23. Dedicated to Ged. CORE-12409

[JSCRIPT] Sync with Wine Staging 1.9.23. Dedicated to Ged. CORE-12409

7af3f65 jscript: Add more jsdisp_t to Instance helpers.
55f6e3c jscript: Use the existing helpers to get from a jsdisp_t to an Instance.
0f21353 jscript: Use wine_rb_tree to store local variables in compiler_ctx_t.
fc1ae4f jscript: Use CONTAINING_RECORD() to get from a field to a struct.
57291c4 jscript: Simplify create_utc_string and add basic tests.
20d5bba jscript: Simplify date_to_string and add basic tests.
4d67ffd jscript: Allocate string of correct size in Date toLocaleDateString method.
79f18d0 jscript: Properly handle \0 characters in Array join method.
fd07a15 jscript: Allocate string of correct size in Date toTimeString method.
1c3e0dd jscript: Properly handle \0 characters in String indexOf method.
54e6736 jscript: Properly handle \0 characters in String to{Lower,Upper}Case methods.
1842082 jscript: Do not include terminating \0 in result returned by Date_toLocale{Date,Time}String.
69437af jscript: Change prototype of jsstr_alloc_buf and fix some error handling issues.
d36ae56 jscript: Fix definition of JSSTR_MAX_LENGTH.
7369836 jscript: Simplify jsstr_release implementation.

svn path=/trunk/; revision=73354