Fix parser crash on pointer dereference assignment

Fixed a parser crash that occurred when encountering pointer dereference
assignment statements like '*ap = 0;'. The issue was that the parser
was trying to find a function named '*ap' before properly handling
the pointer dereference syntax.

The fix adds a has_asterisk flag to detect when the statement begins
with an asterisk operator and skips the function call check in this case,
allowing the existing pointer dereference handling code to process
the statement correctly.

Author: jserv

src/parser.c

@@ -3232,7 +3232,8 @@ basic_block_t *read_body_statement(block_t *parent, basic_block_t *bb)
     else if (lex_accept(T_decrement))
         prefix_op = OP_sub;
     /* must be an identifier or asterisk (for pointer dereference) */
-    if (!lex_peek(T_identifier, token) && !lex_peek(T_asterisk, NULL))
+    bool has_asterisk = lex_peek(T_asterisk, NULL);
+    if (!lex_peek(T_identifier, token) && !has_asterisk)
         error("Unexpected token");
 
     /* handle macro parameter substitution for statements */
@@ -3350,14 +3351,16 @@ basic_block_t *read_body_statement(block_t *parent, basic_block_t *bb)
         return bb;
     }
 
-    /* is a function call? */
-    func = find_func(token);
-    if (func) {
-        lex_expect(T_identifier);
-        read_func_call(func, parent, &bb);
-        perform_side_effect(parent, bb);
-        lex_expect(T_semicolon);
-        return bb;
+    /* is a function call? Skip function call check when has_asterisk is true */
+    if (!has_asterisk) {
+        func = find_func(token);
+        if (func) {
+            lex_expect(T_identifier);
+            read_func_call(func, parent, &bb);
+            perform_side_effect(parent, bb);
+            lex_expect(T_semicolon);
+            return bb;
+        }
     }
 
     /* handle pointer dereference expressions like *ptr = value */