Allow larger buffer in String_Parser

Buffer was dynamically allocated based on first entry of data type.
In case the second entry (e.g. Y) was larger, it was truncated.

src/String_Parser.cpp

@@ -139,8 +139,12 @@ int String_Parser::string(std::string& string, data_obs* data){
     		os << buffer;
     		break;}
     	case 'D':{
-    		// Get number of characters to write
-    		int len = snprintf(c,1,sel.c_str(),data->get_data(1));
+            // Get number of characters to write:
+            // Append 50 characters to avoid problems when
+            // resulting string is larger for second number.
+            // TODO Easier solution would be to use static buffer length,
+            // and give warning in case of short buffer.
+            int len = snprintf(c,1,sel.c_str(),data->get_data(1)) + 50;
     		char buffer[len+1]="";
     		// Check if all data or specified data requested
     		int N; int i;
@@ -159,7 +163,8 @@ int String_Parser::string(std::string& string, data_obs* data){
     		break;}
     	case 'S':{
     		// Get number of characters to write
-    		int len = snprintf(c,1,sel.c_str(),data->get_supp(1));
+            // TODO For added 50, see comment above in treatment of 'D'
+            int len = snprintf(c,1,sel.c_str(),data->get_supp(1)) + 50;
     		char buffer[len+1]="";
     		// Check if all data or specified data requested
     		int N; int i;