msvcp90: Added basic_string<char>::c_str implementation.

dlls/msvcp90/msvcp90.spec

@@ -3041,8 +3041,8 @@
 @ stub -arch=win64 ?begin@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAA?AV?$_String_iterator@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@XZ
 @ stub -arch=win32 ?begin@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QBE?AV?$_String_const_iterator@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@XZ
 @ stub -arch=win64 ?begin@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEBA?AV?$_String_const_iterator@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@XZ
-@ stub -arch=win32 ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ
-@ stub -arch=win64 ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEBAPEBDXZ
+@ cdecl -arch=win32 -i386 -norelay ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ() __thiscall_MSVCP_basic_string_char_c_str
+@ cdecl -arch=win64 ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEBAPEBDXZ(ptr) MSVCP_basic_string_char_c_str
 @ stub -arch=win32 ?c_str@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QBEPBGXZ
 @ stub -arch=win64 ?c_str@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEBAPEBGXZ
 @ stub -arch=win32 ?c_str@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QBEPB_WXZ

dlls/msvcp90/string.c

@@ -655,6 +655,15 @@ basic_string_char* __stdcall MSVCP_basic_string_char_assign_cstr(
             MSVCP_char_traits_char_length(str));
 }
 
+/* ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ */
+/* ?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEBAPEBDXZ */
+DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_c_str, 4)
+const char* __stdcall MSVCP_basic_string_char_c_str(basic_string_char *this)
+{
+    TRACE("%p\n", this);
+    return basic_string_char_const_ptr(this);
+}
+
 /* ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ */
 /* ??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAA@XZ */
 DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_ctor, 4)