Test zero exponents with and without signs.

dlls/oleaut32/tests/vartest.c

@@ -972,6 +972,20 @@ static void test_VarParseNumFromStr(void)
   EXPECT(1,NUMPRS_EXPONENT,NUMPRS_EXPONENT,5,0,1);
   EXPECT2(1,FAILDIG);
 
+  /* The same for zero exponents */
+  CONVERT("1e0", NUMPRS_EXPONENT);
+  EXPECT(1,NUMPRS_EXPONENT,NUMPRS_EXPONENT,3,0,0);
+  EXPECT2(1,FAILDIG);
+
+  /* Sign on a zero exponent doesn't matter */
+  CONVERT("1e+0", NUMPRS_EXPONENT);
+  EXPECT(1,NUMPRS_EXPONENT,NUMPRS_EXPONENT,4,0,0);
+  EXPECT2(1,FAILDIG);
+
+  CONVERT("1e-0", NUMPRS_EXPONENT);
+  EXPECT(1,NUMPRS_EXPONENT,NUMPRS_EXPONENT,4,0,0);
+  EXPECT2(1,FAILDIG);
+
   /* Doesn't consume a real number exponent */
   CONVERT("1e1.", NUMPRS_EXPONENT);
   EXPECT(1,NUMPRS_EXPONENT,NUMPRS_EXPONENT,3,0,1);