Fix some 32-bit compile errors

libraries/wasm-jit/Source/Runtime/Table.cpp

@@ -18,7 +18,7 @@ namespace Runtime
 		TableInstance* table = new TableInstance(type);
 
 		// In 64-bit, allocate enough address-space to safely access 32-bit table indices without bounds checking, or 16MB (4M elements) if the host is 32-bit.
-		const Uptr tableMaxBytes = HAS_64BIT_ADDRESS_SPACE ? (sizeof(TableInstance::FunctionElement) << 32) : 16*1024*1024;
+		const Uptr tableMaxBytes = HAS_64BIT_ADDRESS_SPACE ? Uptr(U64(sizeof(TableInstance::FunctionElement)) << 32) : 16*1024*1024;
 		
 		// On a 64 bit runtime, align the table base to a 4GB boundary, so the lower 32-bits will all be zero. Maybe it will allow better code generation?
 		// Note that this reserves a full extra 4GB, but only uses (4GB-1 page) for alignment, so there will always be a guard page at the end to

libraries/wasm-jit/Source/WAST/Parse.cpp

@@ -261,10 +261,10 @@ namespace WAST
 			}
 		};
 
-		assert(nextChar - state.string > state.nextToken->begin + 1);
+		assert(U32(nextChar - state.string) > state.nextToken->begin + 1);
 		++state.nextToken;
-		assert(nextChar - state.string <= state.nextToken->begin);
-		assert(nextChar - firstChar <= UINT32_MAX);
+		assert(U32(nextChar - state.string) <= state.nextToken->begin);
+		assert(U32(nextChar - firstChar) <= UINT32_MAX);
 		outName = Name(firstChar,U32(nextChar - firstChar));
 		return true;
 	}