overlays: decompile PointInBox family (3 funcs)

Byte-exact carve of the reloc-free point-in-box test across ov000 and
ov025 (two instances). Returns 1 when a u16 position lies within a
u8 x/y/w/h box.

Author: Yokimitsuro

src/overlays/ov000/auto/func_ov000_020589a0.c

@@ -0,0 +1,6 @@
+int func_ov000_020589a0(unsigned short *pos, unsigned char *box) {
+    if ((unsigned short)(pos[0] - box[0]) < box[2]) {
+        if ((unsigned short)(pos[1] - box[1]) < box[3]) return 1;
+    }
+    return 0;
+}

src/overlays/ov025/auto/func_ov025_0209d6c4.c

@@ -0,0 +1,6 @@
+int func_ov025_0209d6c4(unsigned short *pos, unsigned char *box) {
+    if ((unsigned short)(pos[0] - box[0]) < box[2]) {
+        if ((unsigned short)(pos[1] - box[1]) < box[3]) return 1;
+    }
+    return 0;
+}

src/overlays/ov025/auto/func_ov025_0209e880.c

@@ -0,0 +1,6 @@
+int func_ov025_0209e880(unsigned short *pos, unsigned char *box) {
+    if ((unsigned short)(pos[0] - box[0]) < box[2]) {
+        if ((unsigned short)(pos[1] - box[1]) < box[3]) return 1;
+    }
+    return 0;
+}