A few fixes to prepare for MSVC building

Author: sipa

include/minisketch.h

@@ -3,7 +3,12 @@
 
 #include <stdint.h>
 #include <stdlib.h>
-#include <unistd.h>
+
+#ifdef _MSC_VER
+#  include <compat.h>
+#else
+#  include <unistd.h>
+#endif
 
 #ifdef __cplusplus
 #  if __cplusplus >= 201103L

src/fields/clmul_common_impl.h

@@ -8,7 +8,7 @@
 #define _MINISKETCH_FIELDS_CLMUL_COMMON_IMPL_H_ 1
 
 #include <stdint.h>
-#include <x86intrin.h>
+#include <immintrin.h>
 
 #include "../int_utils.h"
 #include "../lintrans.h"

src/minisketch.cpp

@@ -332,7 +332,7 @@ int minisketch_implementation_supported(uint32_t bits, uint32_t implementation)
             delete sketch;
             return 1;
         }
-    } catch (std::bad_alloc& ba) {}
+    } catch (const std::bad_alloc&) {}
     return 0;
 }
 
@@ -342,14 +342,14 @@ minisketch* minisketch_create(uint32_t bits, uint32_t implementation, size_t cap
         if (sketch) {
             try {
                 sketch->Init(capacity);
-            } catch (std::bad_alloc& ba) {
+            } catch (const std::bad_alloc&) {
                 delete sketch;
                 throw;
             }
             sketch->Ready();
         }
         return (minisketch*)sketch;
-    } catch (std::bad_alloc& ba) {
+    } catch (const std::bad_alloc&) {
         return nullptr;
     }
 }