msvcp90: Added basic_string<char> copy constructor implementation.

dlls/msvcp90/msvcp90.spec

@@ -732,8 +732,8 @@
 @ stub -arch=win64 ??0?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IEAA@W4_Uninitialized@1@@Z
 @ stub -arch=win32 ??0?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IAE@XZ
 @ stub -arch=win64 ??0?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IEAA@XZ
-@ stub -arch=win32 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z
-@ stub -arch=win64 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@AEBV01@@Z
+@ cdecl -arch=win32 -i386 -norelay ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z(ptr) __thiscall_MSVCP_basic_string_char_copy_ctor
+@ cdecl -arch=win64 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@AEBV01@@Z(ptr ptr) MSVCP_basic_string_char_copy_ctor
 @ stub -arch=win32 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@II@Z
 @ stub -arch=win64 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@AEBV01@_K1@Z
 @ stub -arch=win32 ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@IIABV?$allocator@D@1@@Z

dlls/msvcp90/string.c

@@ -666,6 +666,19 @@ basic_string_char* __stdcall MSVCP_basic_string_char_ctor(basic_string_char *thi
     return this;
 }
 
+/* ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z */
+/* ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@AEBV01@@Z */
+DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_copy_ctor, 8)
+basic_string_char* __stdcall MSVCP_basic_string_char_copy_ctor(
+    basic_string_char *this, const basic_string_char *copy)
+{
+    TRACE("%p %p\n", this, copy);
+
+    basic_string_char_tidy(this, FALSE, 0);
+    MSVCP_basic_string_char_assign(this, copy);
+    return this;
+}
+
 /* ??1?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ */
 /* ??1?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@XZ */
 DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_dtor, 4)