Description: Fix ftbfs with GCC-10

Author: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Bug-Debian: https://bugs.debian.org/957183
Forwarded: no

---

--- eukleides-1.5.4.orig/src/common/quadrilateral.c
+++ eukleides-1.5.4/src/common/quadrilateral.c
@@ -26,9 +26,9 @@
 
 #define STO(addr) (POP(_symbol))->content->value.point = (addr)
 
-double l, m, x, y, u, v;
+static double l, m, x, y, u, v;
 
-_point *A, *B, *C, *D;
+static _point *A, *B, *C, *D;
 
 void assign(int p, int s)
 {
--- eukleides-1.5.4.orig/src/common/triangle.c
+++ eukleides-1.5.4/src/common/triangle.c
@@ -26,9 +26,9 @@
 
 #define STO(addr) (POP(_symbol))->content->value.point = (addr)
 
-_point *A, *B, *C;
+static _point *A, *B, *C;
 
-double a, x, y;
+static double a, x, y;
 
 void assign_A_B(int p)
 {