Fix AIX compulation (break addr resolution)

Revert c92c161585, casting to void*
cannot fool gcc. The AIX address resolution was broken anyway, so
just avoid the problem and make it compile well.

mysys/my_addr_resolve.c

@@ -319,12 +319,20 @@ int my_addr_resolve(void *ptr, my_addr_loc *loc)
     /* Save result for future comparisons. */
     strnmov(addr2line_binary, info.dli_fname, sizeof(addr2line_binary));
 
+#ifdef _AIX
+    /*
+      info.dli_fbase is a char on AIX and casting it doesn't fool gcc.
+      leave backtracing broken on AIX until a real solution can be found.
+    */
+    addr_offset= NULL;
+#else
     /*
       Check if we should use info.dli_fbase as an offset or not
       for the base program. This is depending on if the compilation is
       done with PIE or not.
     */
-    addr_offset= (void*) info.dli_fbase;
+    addr_offset= info.dli_fbase;
+#endif
 #ifndef __PIE__
     if (strcmp(info.dli_fname, my_progname) == 0 &&
         addr_resolve((void*) my_addr_resolve, loc) == 0 &&