Fixed some memory leaks in ECPG.

Patch by Michael Paquier

src/interfaces/ecpg/preproc/descriptor.c

@@ -175,6 +175,7 @@ output_get_descr(char *desc_name, char *index)
 	for (results = assignments; results != NULL; results = results->next)
 	{
 		const struct variable *v = find_variable(results->variable);
+		char *str_zero = mm_strdup("0");
 
 		switch (results->value)
 		{
@@ -188,7 +189,8 @@ output_get_descr(char *desc_name, char *index)
 				break;
 		}
 		fprintf(yyout, "%s,", get_dtype(results->value));
-		ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, mm_strdup("0"), NULL, NULL);
+		ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
+		free(str_zero);
 	}
 	drop_assignments();
 	fputs("ECPGd_EODT);\n", yyout);
@@ -292,8 +294,12 @@ output_set_descr(char *desc_name, char *index)
 			case ECPGd_indicator:
 			case ECPGd_length:
 			case ECPGd_type:
-				fprintf(yyout, "%s,", get_dtype(results->value));
-				ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, mm_strdup("0"), NULL, NULL);
+				{
+					char *str_zero = mm_strdup("0");
+					fprintf(yyout, "%s,", get_dtype(results->value));
+					ECPGdump_a_type(yyout, v->name, v->type, v->brace_level, NULL, NULL, -1, NULL, NULL, str_zero, NULL, NULL);
+					free(str_zero);
+				}
 				break;
 
 			default:

src/interfaces/ecpg/preproc/pgc.l

@@ -27,7 +27,7 @@
 extern YYSTYPE yylval;
 
 static int		xcdepth = 0;	/* depth of nesting in slash-star comments */
-static char	   *dolqstart;		/* current $foo$ quote start string */
+static char	   *dolqstart = NULL;	/* current $foo$ quote start string */
 static YY_BUFFER_STATE scanbufhandle;
 static char *scanbuf;
 
@@ -550,6 +550,8 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})(.*\\{space})*.
 			}
 <SQL>{dolqdelim} {
 				token_start = yytext;
+				if (dolqstart)
+					free(dolqstart);
 				dolqstart = mm_strdup(yytext);
 				BEGIN(xdolq);
 				startlit();

src/interfaces/ecpg/preproc/variable.c

@@ -437,11 +437,13 @@ remove_variable_from_list(struct arguments ** list, struct variable * var)
 void
 dump_variables(struct arguments * list, int mode)
 {
-	char	   *str_zero = mm_strdup("0");
+	char	   *str_zero;
 
 	if (list == NULL)
 		return;
 
+	str_zero = mm_strdup("0");
+
 	/*
 	 * The list is build up from the beginning so lets first dump the end of
 	 * the list: