Fix Fraction(-2147483648.0) for 32-bit wide long

Change-Id: I6465377de1edff5d0ccc0049fb6d24f6f1223fd2

tools/qa/cppunit/test_fract.cxx

@@ -90,8 +90,15 @@ public:
 #endif
     }
 
+    void testMinLongDouble() {
+        Fraction f(double(SAL_MIN_INT32));
+        CPPUNIT_ASSERT_EQUAL(long(SAL_MIN_INT32), f.GetNumerator());
+        CPPUNIT_ASSERT_EQUAL(1L, f.GetDenominator());
+    }
+
     CPPUNIT_TEST_SUITE(FractionTest);
     CPPUNIT_TEST(testFraction);
+    CPPUNIT_TEST(testMinLongDouble);
     CPPUNIT_TEST_SUITE_END();
 };
 

tools/source/generic/fract.cxx

@@ -136,7 +136,7 @@ Fraction::Fraction( double dVal )
         return;
     }
 
-    while ( std::abs( (long)dVal ) < nMAX && nDen < nMAX )
+    while ( std::abs( dVal ) < nMAX && nDen < nMAX )
     {
         dVal *= 10;
         nDen *= 10;