fix local var names

src/boot_O2_g3/boot_0x800968B0.c

@@ -5,14 +5,15 @@
  * Compare strings (strcmp).
  */
 s32 func_800968B0(const char* str1, const char* str2) {
-    char v0;
-    char v1;
+    char currentCharStr1;
+    char currentCharStr2;
     do {
-        v0 = *str1++;
-        v1 = *str2++;
-        if (v0 != v1) {
-          return v0 - v1;
+        currentCharStr1 = *str1++;
+        currentCharStr2 = *str2++;
+        if (currentCharStr1 != currentCharStr2) {
+          return currentCharStr1 - currentCharStr2;
         }
-    } while (v0);
+    } while (currentCharStr1);
+
     return 0;
 }