Wrap the "if (ctx->handling) return;" check in a macro for readability

lib/libvcc/vcc_compile.c

@@ -579,6 +579,8 @@ vcc_CompileSource(struct vcc *tl, struct source *sp)
 	Fh(tl, 0, "/* ---===### VCC generated .h code ###===---*/\n");
 	Fc(tl, 0, "\n/* ---===### VCC generated .c code ###===---*/\n");
 
+	Fc(tl, 0, "\n#define END_ if (*ctx->handling) return\n");
+
 	vcc_Parse_Init(tl);
 
 	vcc_Expr_Init(tl);

lib/libvcc/vcc_parse.c

@@ -149,7 +149,7 @@ vcc_Compound(struct vcc *tl)
 	Fb(tl, 1, "{\n");
 	tl->indent += INDENT;
 	C(tl, ";");
-	Fb(tl, 1, "if (*ctx->handling) return;\n");
+	Fb(tl, 1, "END_;\n");
 	while (1) {
 		ERRCHK(tl);
 		t = tl->t;
@@ -206,7 +206,7 @@ vcc_Compound(struct vcc *tl)
 			vcc_ErrWhere(tl, tl->t);
 			return;
 		}
-		Fb(tl, 1, "if (*ctx->handling) return;\n");
+		Fb(tl, 1, "END_;\n");
 	}
 }