fix some issues identified by cppcheck

src/args.c

@@ -156,7 +156,7 @@ buildargv(const char *input, int *_argc, char *appname)
 			if (argc >= (maxargc - 1))
 			{
 				maxargc *= 2;
-				argv = (char **) realloc(argv, maxargc * sizeof (char *));
+				argv = (char **) srealloc(argv, maxargc * sizeof (char *));
 				argv[argc] = NULL;
 			}
 
@@ -524,7 +524,7 @@ readargs(char **argv,
 			case 31:
 				{
 					char   *nullstr;
-					int		size;
+					int		size = strlen(optarg);
 
 					nullstr = trim_quoted_str(optarg, &size);
 					if (size > 255)

src/pretty-csv.c

@@ -1470,6 +1470,8 @@ read_and_format(Options *opts, DataDesc *desc, StateData *state)
 			if (query != opts->query)
 				free(query);
 
+			free(linebuf.buffer);
+
 			return false;
 		}
 	}
@@ -1478,6 +1480,8 @@ read_and_format(Options *opts, DataDesc *desc, StateData *state)
 		if (!f_data)
 		{
 			format_error("missing data");
+			free(linebuf.buffer);
+
 			return false;
 		}
 
@@ -1494,6 +1498,8 @@ read_and_format(Options *opts, DataDesc *desc, StateData *state)
 		if (!f_data)
 		{
 			format_error("missing data");
+			free(linebuf.buffer);
+
 			return false;
 		}
 

src/pspg.c

@@ -1991,10 +1991,10 @@ export_to_file(PspgCommand command,
 				rows = (int) percent;
 				percent = 0.0;
 			}
-		}
 
-		strncpy(last_rows_number, number, sizeof(last_rows_number) - 1);
-		last_rows_number[sizeof(last_rows_number) - 1] = '\0';
+			strncpy(last_rows_number, number, sizeof(last_rows_number) - 1);
+			last_rows_number[sizeof(last_rows_number) - 1] = '\0';
+		}
 	}
 
 	if (copy_to_file)

src/table.c

@@ -436,9 +436,17 @@ _getline(char **lineptr, size_t *n, FILE *fp, bool is_nonblocking, bool wait_on_
 
 				if (dynbuf)
 				{
-					dynbuf = realloc(dynbuf, fetched_chars + len + 1);
-					if (!dynbuf)
+					char	   *_dynbuf;
+
+					_dynbuf = realloc(dynbuf, fetched_chars + len + 1);
+					if (!_dynbuf)
+					{
+						free(_dynbuf);
 						return -1;
+					}
+					else
+						dynbuf = _dynbuf;
+
 					memcpy(dynbuf + fetched_chars, statbuf, len + 1);
 					fetched_chars += len;
 				}

src/theme_loader.c

@@ -458,6 +458,8 @@ theme_loader(FILE *theme,
 			PspgThemeElement te;
 
 			te.attr = 0;
+			te.fg = PspgWhite;
+			te.bg = PspgBlack;
 
 			_token = ThemeLoaderGetToken(&tokenizer, &token);
 			if (_token)