tests: Mark some file-internal symbols as static.

tests/rotozoom.c

@@ -160,8 +160,8 @@ static void pgmyuv_save(const char *filename, int w, int h,
     free(cr_tab);
 }
 
-unsigned char *rgb_tab;
-int width, height, wrap;
+static unsigned char *rgb_tab;
+static int width, height, wrap;
 
 static void put_pixel(int x, int y, int r, int g, int b)
 {
@@ -177,12 +177,12 @@ static void put_pixel(int x, int y, int r, int g, int b)
     p[2] = b;
 }
 
-unsigned char tab_r[256 * 256];
-unsigned char tab_g[256 * 256];
-unsigned char tab_b[256 * 256];
+static unsigned char tab_r[256 * 256];
+static unsigned char tab_g[256 * 256];
+static unsigned char tab_b[256 * 256];
 
-int h_cos[360];
-int h_sin[360];
+static int h_cos[360];
+static int h_sin[360];
 
 static int ipol(uint8_t *src, int x, int y)
 {

tests/videogen.c

@@ -137,8 +137,8 @@ static void pgmyuv_save(const char *filename, int w, int h,
     free(cr_tab);
 }
 
-unsigned char *rgb_tab;
-int width, height, wrap;
+static unsigned char *rgb_tab;
+static int width, height, wrap;
 
 static void put_pixel(int x, int y, int r, int g, int b)
 {
@@ -200,9 +200,9 @@ typedef struct VObj {
     int r, g, b;
 } VObj;
 
-VObj objs[NB_OBJS];
+static VObj objs[NB_OBJS];
 
-unsigned int seed = 1;
+static unsigned int seed = 1;
 
 static void gen_image(int num, int w, int h)
 {