msvcp90: Added basic_string<wchar>::operator=(const wchar*) implementation.

dlls/msvcp90/msvcp90.spec

@@ -1394,8 +1394,8 @@
 @ stub -arch=win64 ??4?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAAEAV01@PEBG@Z
 @ thiscall -arch=win32 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@ABV01@@Z(ptr ptr) MSVCP_basic_string_wchar_assign
 @ cdecl -arch=win64 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@AEBV01@@Z(ptr ptr) MSVCP_basic_string_wchar_assign
-@ stub -arch=win32 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z
-@ stub -arch=win64 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z
+@ thiscall -arch=win32 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z(ptr wstr) MSVCP_basic_string_wchar_assign_cstr
+@ cdecl -arch=win64 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z(ptr wstr) MSVCP_basic_string_wchar_assign_cstr
 @ stub -arch=win32 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@_W@Z
 @ stub -arch=win64 ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@_W@Z
 @ stub -arch=win32 ??4?$char_traits@D@std@@QAEAAU01@ABU01@@Z

dlls/msvcp90/string.c

@@ -1552,6 +1552,8 @@ basic_string_wchar* __thiscall MSVCP_basic_string_wchar_assign_cstr_len(
 
 /* ?assign@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV12@PB_W@Z */
 /* ?assign@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV12@PEB_W@Z */
+/* ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z */
+/* ??4?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z */
 DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_wchar_assign_cstr, 8)
 basic_string_wchar* __thiscall MSVCP_basic_string_wchar_assign_cstr(
             basic_string_wchar *this, const wchar_t *str)