cast result of "sizeof()" to "int" in testcase, silents GCC warnings about...

cast result of "sizeof()" to "int" in testcase, silents GCC warnings about signed/unsigned comparisons

tests/run/index.pyx

@@ -65,10 +65,10 @@ def test_unsigned_long():
     cdef int i
     cdef unsigned long ix
     cdef D = {}
-    for i from 0 <= i < sizeof(unsigned long) * 8:
+    for i from 0 <= i < <int>sizeof(unsigned long) * 8:
         ix = (<unsigned long>1) << i
         D[ix] = True
-    for i from 0 <= i < sizeof(unsigned long) * 8:
+    for i from 0 <= i < <int>sizeof(unsigned long) * 8:
         ix = (<unsigned long>1) << i
         assert D[ix] is True
         del D[ix]
@@ -78,10 +78,10 @@ def test_unsigned_short():
     cdef int i
     cdef unsigned short ix
     cdef D = {}
-    for i from 0 <= i < sizeof(unsigned short) * 8:
+    for i from 0 <= i < <int>sizeof(unsigned short) * 8:
         ix = (<unsigned short>1) << i
         D[ix] = True
-    for i from 0 <= i < sizeof(unsigned short) * 8:
+    for i from 0 <= i < <int>sizeof(unsigned short) * 8:
         ix = (<unsigned short>1) << i
         assert D[ix] is True
         del D[ix]
@@ -91,10 +91,10 @@ def test_long_long():
     cdef int i
     cdef long long ix
     cdef D = {}
-    for i from 0 <= i < sizeof(long long) * 8:
+    for i from 0 <= i < <int>sizeof(long long) * 8:
         ix = (<long long>1) << i
         D[ix] = True
-    for i from 0 <= i < sizeof(long long) * 8:
+    for i from 0 <= i < <int>sizeof(long long) * 8:
         ix = (<long long>1) << i
         assert D[ix] is True
         del D[ix]