Fix smartauthmon memory corruption due to undersized buffer

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/smartcardauth@1254885 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

src/smartauthmon.cpp

@@ -81,11 +81,11 @@ TQString readfile(const char * filename) {
 	fseek(fp,0,SEEK_END);			// Seek to end
 	len=ftell(fp);				// Get position at end (length)
 	fseek(fp,0,SEEK_SET);			// Seek to beginning
-	buf=(char *)malloc(len);		// Malloc the buffer
+	buf=(char *)malloc(len+1);		// Malloc the buffer
 	fread(buf,len,1,fp);			// Read file
 	fclose(fp);
 	buf[len]=0;
-	TQString contents = TQString(buf);
+	TQString contents(buf);
 	free(buf);				// Free the buffer
 	return contents;
 }