pefile.cpp: make import sorting independent from qsort() internals.

src/pefile.cpp

@@ -874,7 +874,9 @@ unsigned PeFile::processImports0(ord_mask_t ord_mask) // pass 1
             if (u2->ordinal) return 1;
             if (!u1->shname) return 1;
             if (!u2->shname) return -1;
-            return strlen(u1->shname) - strlen(u2->shname);
+            rc = (int) (upx_strlen(u1->shname) - upx_strlen(u2->shname));
+            if (rc) return rc;
+            return strcmp(u1->shname, u2->shname);
         }
     };
 

src/util.h

@@ -100,6 +100,10 @@ inline char *strcpy(unsigned char *s1, const unsigned char *s2) {
     return strcpy((char *) s1, (const char *) s2);
 }
 
+inline int strcmp(const unsigned char *s1, const unsigned char *s2) {
+    return strcmp((const char *) s1, (const char *) s2);
+}
+
 inline int strcasecmp(const unsigned char *s1, const unsigned char *s2) {
     return strcasecmp((const char *) s1, (const char *) s2);
 }