msvcp60: Fixed basic_istream::getline(basic_string) implementation.

dlls/msvcp60/ios.c

@@ -7617,9 +7617,9 @@ basic_istream_char* __cdecl basic_istream_char_getline_bstr_delim(
 
     TRACE("(%p %p %c)\n", istream, str, delim);
 
+    basic_string_char_clear(str);
     if(basic_istream_char_sentry_create(istream, TRUE)) {
         basic_streambuf_char *strbuf = basic_ios_char_rdbuf_get(base);
-        basic_string_char_clear(str);
 
         c = basic_streambuf_char_sgetc(strbuf);
         for(; c!=(unsigned char)delim && c!=EOF; c = basic_streambuf_char_snextc(strbuf))
@@ -8909,9 +8909,9 @@ basic_istream_wchar* __cdecl basic_istream_wchar_getline_bstr_delim(
 
     TRACE("(%p %p %c)\n", istream, str, delim);
 
+    basic_string_wchar_clear(str);
     if(basic_istream_wchar_sentry_create(istream, TRUE)) {
         basic_streambuf_wchar *strbuf = basic_ios_wchar_rdbuf_get(base);
-        basic_string_wchar_clear(str);
 
         c = basic_streambuf_wchar_sgetc(strbuf);
         for(; c!=delim && c!=WEOF; c = basic_streambuf_wchar_snextc(strbuf))

dlls/msvcp60/string.c

@@ -153,6 +153,7 @@ void __thiscall basic_string_char__Eos(basic_string_char *this, MSVCP_size_t len
 
 void basic_string_char_clear(basic_string_char *this)
 {
+    if(this->ptr)
         basic_string_char__Eos(this, 0);
 }
 
@@ -1865,6 +1866,7 @@ void __thiscall basic_string_wchar__Eos(basic_string_wchar *this, MSVCP_size_t l
 
 void basic_string_wchar_clear(basic_string_wchar *this)
 {
+    if(this->ptr)
         basic_string_wchar__Eos(this, 0);
 }