From eaf85a757a9f7bb69c9bdc4bf6ec07e48f5769ac Mon Sep 17 00:00:00 2001
From: Takahiro Ueda <tueda@st.seikei.ac.jp>
Date: Wed, 21 Nov 2018 15:20:16 +0900
Subject: [PATCH] Remove more gcc warnings (gcc version dependent)

---
 sources/poly.cc   | 2 +-
 sources/pre.c     | 2 ++
 sources/startup.c | 4 ++--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/sources/poly.cc b/sources/poly.cc
index a0398a78..e934e19b 100644
--- a/sources/poly.cc
+++ b/sources/poly.cc
@@ -1997,7 +1997,7 @@ int poly::first_variable () const {
 	
 	int var = AN.poly_num_vars;
 	for (int j=0; j<var; j++)
-		if (terms[2+j]>0) var=j;
+		if (terms[2+j]>0) return j;
 	return var;
 }
 
diff --git a/sources/pre.c b/sources/pre.c
index f2606108..c343210d 100644
--- a/sources/pre.c
+++ b/sources/pre.c
@@ -5248,6 +5248,7 @@ int DoExternal(UBYTE *s)
 			case 10:/*'\0' fits here*/
 				MesPrint("@Can't finde closing \"");
 				Terminate(-1);
+				break;
 			case 0:case 1: continue;
 			default:
 				break;
@@ -5629,6 +5630,7 @@ int DoFromExternal(UBYTE *s)
 			case 10:/*'\0' fits here*/
 				MesPrint("@Can't finde closing \"");
 				Terminate(-1);
+				break;
 			case 0:case 1: continue;
 			default:
 				break;
diff --git a/sources/startup.c b/sources/startup.c
index e1cfe03e..b92ce1b9 100644
--- a/sources/startup.c
+++ b/sources/startup.c
@@ -1042,7 +1042,7 @@ VOID StartVariables()
 	We do want to give them unique names though that the user cannot access.
 */
 	{
-		char dumstr[10];
+		char dumstr[20];
 		for ( ; i < FIRSTUSERSYMBOL; i++ ) {
 			sprintf(dumstr,":%d:",i);
 			AddSymbol((UBYTE *)dumstr,-MAXPOWER,MAXPOWER,VARTYPENONE,0);
@@ -1069,7 +1069,7 @@ VOID StartVariables()
 	We do want to give them unique names though that the user cannot access.
 */
 	{
-		char dumstr[10];
+		char dumstr[20];
 		for ( ; i < FIRSTUSERFUNCTION-FUNCTION; i++ ) {
 			sprintf(dumstr,"::%d::",i);
 			AddFunction((UBYTE *)dumstr,0,0,0,0,0,-1,-1);